Replacing 5th gear gear on Lada Largus (reviews and comparisons)

March 25, 2016 Lada.Online 122 321 21
Largus 5th gear ratios are excellent for those who drive the car mainly around the city, often with a full load. The shortcomings are revealed on the highway when you don’t have time to reach 100 km/h, and the engine speed is already at around 3000 rpm. You can get rid of the hum and howl of the engine and gearbox with the help of a simple modification: “replacing the fifth gear gear.”

How to change fifth gear gears?

Let's start by removing the oil pan protection.
Unscrew the bolts 10 mm, being careful not to twist them. And this is quite possible: they often sour well, so if you don’t want to bother with drilling them later or attaching the protection with self-tapping screws, you need to unscrew them carefully. However, regular WD40 can help. Drain the oil from the gearbox. Everything here is elementary, unless you confuse the engine crankcase and gearbox.

We unscrew the filler plug and tighten the drain (not forgetting to install a new sealing washer).

All that remains is to install the protection, and at the same time treat the protection bolts with any grease to prevent them from souring in the future.

Let's move on to the front left wheel. How to remove a wheel is unnecessary to explain.

We find the “lamb” on the fender liner at the top left of the wheel. We turn it counterclockwise and move the fender liner, fixing it directly on the bumper. Before us is a view of the gearbox, partially blocked by the subframe amplifier. It will also have to be removed by unscrewing two bolts.

We find the reverse sensor connector: it is screwed into the gearbox, there are simply no other sensors there. Remove the connector, then disconnect the wiring from the gearbox cover. It is usually attached with a plastic clamp that can be easily removed with wire cutters.

After making sure that nothing prevents you from removing the gearbox cover, unscrew its bolts. We wipe our hands and remove the lid to the side.

In front of us are the gears of the 5th gear, which we have to replace. The hardest thing is to remove these stars. It will be much easier to install new ones.

First we have to pull out the 5th gear shift fork. Therefore, we take a drift, a hammer and try to knock out the pin that secures it to the shaft. He will have to be beaten from the bottom up, which in itself is already interesting. Instead of a drift, an ordinary drill will do just fine: it’s not a shame to break it, and choosing the right diameter is not difficult. So, we begin to knock on the pin and watch how it slowly creeps up. There is no need to hit with a hammer with all your might; the box, although powerful, is quite fragile in places.

After the pin has flown out of the plug, we begin to remove it. She needs to be pulled towards herself. If you decide to do without special pullers, then, provided that you have an assistant, this is done as follows: one holds the fork with his hand, the second quietly taps the shaft through a drift. If you are careful but persistent, everything will work out and the fork will be in your hands.

Now we remove the gears, starting with the input shaft.

We unscrew the nut, then carefully pick up the washer behind it and pull it out of the seat. It happens that they fly away somewhere into the bowels of the garage after the pin, but if in addition to the sprockets you purchased a new nut, washer and pin, there is no need to crawl on your knees with a flashlight.

Next we try to remove the first gear from the input shaft. Here a special puller is used. But in its absence we act differently. You can try to carefully pry it off on both sides with ties and pull, but most likely this will not be effective. Then we take a regular universal puller and use it.

Why and how to correctly change gears in a Lada Largus manual transmission?

25.04.2017
Once upon a time, three speeds in a manual transmission were enough for motorists, but now sometimes even five is not enough. After all, there are two types of gears - short and long. The former have a larger gear ratio, so the car’s wheels rotate at a low speed, but the torque is high. Long gears are the exact opposite: low gear ratios, low torque and high wheel speeds.

Moreover, the checkpoints themselves are sometimes called “long” and “short”. Accordingly, in “short” gearboxes, the gear ratios are selected so that it is not the speed of the machine that develops, but a large torque. Units of this type are mainly used in commercial vehicles capable of transporting large loads. Therefore, if you install them on passenger cars, even in fifth gear the engine will make such an unpleasant noise at high speeds that you can go crazy. Although light trucks also have problems with this, especially when the vehicle is used not only with a load in the city, but also on the highway: speed picks up quickly, but maximum dynamics are greatly limited. And it’s good when there are 6-8 gears - then, gradually moving through them, you can gradually accelerate to a speed of 120 km/h without the feeling that the engine will fly into the air from high speeds. However, the more gears in the car, the larger and more massive the manual transmission.

A similar problem is well known to drivers of the Lada Largus, which is equipped with four modifications of gearboxes. They have different gear ratios, with the “slowest” ones installed on seven-seater versions and vans equipped with an eight-valve K7M engine. After all, it is the hardest for a truck to pick up speed, and for a seven-seater Largus this power unit is a little weak. However, other modifications of this model also raise many questions. For example, a seven-seater with a K4M engine, which theoretically has a fifth gear “wired” into the box. However, in practice, it turns out that at a cruising speed of 120 km/h, the revolutions in no way fall below 4,000. For a not very revving, but high-torque engine, this is too much. In fact, there is no fifth gear

The first owners of the Lada Largus, including driving instructors from Maryino (the automatic transmission, for purely personal reasons, no longer satisfied them), at one time, either jokingly or seriously, considered the possibility of replacing the standard manual transmission with a third-party unit. Although in fact this only harms the car. And why engage in amateur activities, if a long time ago, sets of fifth gear gears were sold in car dealerships? It is permissible to install them instead of standard ones, and the car will drive normally. You just need to know how to properly organize the installation process.

Preparatory part

Digging through either a manual or an automatic transmission is not for the weak. But the city takes courage, and in addition, the work ahead is not as difficult as it seems at first. If only because you won’t have to remove the manual transmission. However, in addition to desire, you need not only a set consisting of two gears, a lock washer, a star bolt, a nut and a pin, but also a removable tool. From an official dealer it costs about 20 thousand rubles, so there is no point in spending that amount - you only need it for a one-time job. To replace, you can take a standard gear puller, a set of heads, including those with size 27, and a wheel wrench, which is needed to remove the wheel, a drift, a hammer and screwdrivers. Of course, you can’t do without a lift either.

Access to gears

At the start of work, you need to drain the oil. To do this, remove the air pipe, lift the car on a lift, remove the protection and unscrew the drain plug. Next, we dismantle the left wheel on the left - there is no point in describing this simple operation - and, turning the “thumb”, remove the fender liner (aka the locker). Then the fender liner should be bent to the side and fixed to the bumper. Finally, we unscrew the 2 bolts holding the subframe reinforcement.

Since we need to remove the rear cover of the manual transmission, we will have to disconnect the speed sensor wire from it. It is attached to the lid with a plastic clamp, which is simply cut off with wire cutters. Then we unscrew the lid bolts with a head and substitute an empty container - a little oil almost always leaks out.

Dismantling

So, part of the internal space of the gearbox has opened up in front of us, in which we will continue to work. And the first thing you have to do is remove the fifth gear fork along with its gears. To do this, unscrew the gear nut and remove the washer. Since the fork is fixed on the shaft with a pin, it must be knocked out. The operation requires the use of a drift, and you need to hit it from the bottom up. Or rather, don’t beat until you’re stupefied, but just knock – after all, the pin will pop out in any case, and it’s no good to break the manual transmission. Moreover, if the pin has flown somewhere, this is not a reason for frustration: the old one cannot be used, but a new one is included in the kit. As our familiar driving instructor from Maryino says, an automatic transmission is much more difficult to break than a manual transmission...

Now you need to remove the plug itself. This operation is not very simple, but you can pull out the part by holding it with your hand and gently tapping it on the shaft. That's it, we've reached the fifth gear gears! First you need to remove the one that is on the input shaft. Attempts to pry the gear from different sides with a pry bar, as is done in garage workshops, usually do not yield results. Therefore, you will have to use a standard puller, which, thanks to the presence of a bolt and three legs, copes with the task quite well. The second gear is removed using an oil film and does not require the use of special tools.

It was the turn of the gear on the secondary shaft. To remove it, you need to unscrew the nut with a 27 mm socket - nothing complicated. We remove the gear itself using a simple puller that we have already used, which you can make yourself. Now you can rejoice: the most difficult part of the work is completed.

Assembly

The more interesting part, which is assembly, begins with installing the gear from the kit on the output shaft. In order for the part to fit deeper into it, you need to tap it around the perimeter. There is no need to tighten anything yet, just slide the gears onto the input shaft. Moreover, you will also have to tap, but only one - the one that was filmed first and edited second. Next, we install the remaining components from the fifth gear kit - bolt, nut, washer - and tighten the gears.

Having put on the fork, it must be secured with a new pin. Since it will not be possible to “drive” it into the hole with a hammer - the subframe will not allow this to be done - we use an improvised extension cord. For example, from a ratchet wrench, or a “nameless” rod. Next, we get into Largus and, with the engine turned off, try to change all gears sequentially. At the same time, you cannot behave like a driving instructor from Maryino, whose automatic transmission, with any extraneous noise, almost causes him to have a pre-heart attack. Why? Because the testing procedure is accompanied by a loud sound, but this is normal: firstly, the manual transmission cover is still open, and secondly, there is no oil in the gearbox. The main thing is that all transmissions work easily and clearly. If everything works fine, we continue the assembly further.

We put the lid of the box in place and check the rubber seal that runs along its perimeter. If the seal is loose, tighten it so that there is no gap. After tightening the cover fastening bolts, we put the speed sensor connector in its proper place, and fasten the wire to it with a new clamp. Finally, all that remains is to add oil and tighten the hole plug.

How correctly we carried out the work of replacing the gears can only be finally checked with the car hanging and the engine running. If the hub rotates, then there is no need to run to the “auto disassembly” for a used manual transmission for the Lada Largus and validol tablets...

Replacing the Largus gear

Gearbox ratio: what it means and how to calculate it
Replacing Largus 5th gear gears is done as follows:

The grease should be drained from the axle housing.
Then you need to unscrew the bolts that secure the hub covers, unscrew the air supply angles from the axle shafts and remove the hub covers together with the seals and hoses.
Next, use a puller to remove the axle shafts.
Then unfasten the device and roll out the cart with the driving rear axle from under the car.
The front bridge must be removed in the same way.
As an addition, you need to disconnect the bipod rod of the steering mechanism from the steering cam lever on the left, the amplifier from the steering cam lever on the right.
Disconnect and remove the shock absorber heads from the brackets.
The next step is to use the arranged and attached device to raise the bridge and unscrew the nuts of the stepladders and disconnect the spring clamps at the front.
Lower the front drive axle onto the cart.

If you don’t have car repair skills, then it would be right to contact a car service center, where the Largus spare part will be replaced by professionals, experienced car mechanics. This guarantees the quality of the repair. If you have questions regarding ordering auto parts, call us or write to our email address. We will deliver your order quickly in Moscow and the region.

Preparatory work

Gearbox ratio

According to Renault regulations, when working on the Largus gearbox, the nut washer and input shaft nut, the shift fork pin and the rear end bolt of the secondary shaft must be replaced. The cost of consumables for Largus is low. This is a plus for both Russian cars and Renault cars. However, as experience shows, most services do not do this, which can lead to other damage.

To replace the 5th gear gear you will need:

standard set of wrenches, sockets and pullers;
punches;
small screwdriver;
hammer;
rubber mallet;
means for cleaning and degreasing the surface of parts;
FRENETANCHE thread locker.

It is recommended to carry out all work on a special lift; if one is not available, drive the car onto a pit or overpass. Before starting work, disconnect the battery.

Positive and negative sides

The standard version of the installed transmission has its advantages, but is not without its disadvantages.

The advantages of domestic owners include:

enviable dynamic performance;
correctly selected gear ratios, which allows movement in traffic without the need for frequent switching;
• “long” fifth gear, which feels like an automatic transmission;
• the ability of the same transmission to maintain torque when engaged with the input shaft even at a speed of 50 km per hour, without stalling the engine.

WHAT IS GOOD?

Compare lada largus and lada largus cross. We are not afraid of potholes. or still not?

The standard sixteen-valve box has both pros and cons. Among the advantages is the ability to provide dynamic acceleration and excellent elasticity. A car with a gross weight of nearly two tons and armed with only a 105-horsepower engine confidently stays in traffic, and in fifth gear it cheerfully picks up from 50 km/h - there is no need to shift often. On long hauls, sometimes you drive for several hours in fifth as if on automatic. It’s convenient, but you have to pay for it with increased noise and fuel consumption - and even when the speedometer needle has not even reached a hundred. Therefore, together with the specialists from our technical center, we decided to experiment with different gear ratios. After all, the design of the Largus transmission allows you to change fifth gear gears without disassembling the entire box or even removing the unit from the car. By the way, owners of Renault models (for example, Logan or Sandero), as well as Nissan-Almera, can similarly configure the top gear for themselves.

There are different sets of gears on sale, each of which will cost about 3,000 rubles. The craftsman will charge the same amount for a replacement. The beauty is that you won’t have to part with the car for a long time: a competent repairman can handle it in a couple of hours. Let's try!

Pros and cons of a sixteen-valve

The standard version of the gearbox has a number of positive and negative aspects, which were also noted by car owners of the Russian station wagon. The advantages include:

excellent dynamics indicators;
confident movement in traffic, without the need for constant switching;
over long distances, driving in fifth gear creates the feeling of an automatic transmission;
the ability to pick up the clutch from the last gear even from 50 km/h.

The disadvantages of driving include a rather unpleasant noise level, as well as increased fuel consumption, which, given its cost in 2017, is a very unpleasant situation. As an experiment, specialists from the LADA technical center set the task of changing gear ratios. The structural features of the car allow you to change the 5th gear gears on the Lada Largus without affecting the integrity of the box, which means that the unit is kept in place without the need for disassembly.

Replacing the fifth gear gear on Largus with your own hands

It is quite difficult to repair a gearbox with your own hands, so experts advise doing it at a service station. However, due to the design features of the gearbox and its location, replacing the 5th Largus gear can be done independently if you have certain skills and experience.

To do this, you must follow clear instructions:

We put the car on a lift or hang it on stands.
We remove the left front wheel and carefully, without breaking the clips and pistons, dismantle the engine compartment protection.
Unscrew the upper fastening of the subframe bracket and move it to the side.
We drain the oil from the crankcase by unscrewing the drain plug with a square wrench (it is advisable to tighten the plug after draining the oil).
Remove the reverse sensor connector and the power steering mounting bracket.
Unscrew the bolts securing the rear gearbox cover.
We dismantle it, thereby opening access to the fifth gear gears.

Before you begin removing the gears, you need to secure them. To do this, pull the fork towards you and use a special mandrel to knock out the fixing pin. Then you need to return the fork to its original position and engage third gear, recessing the rod next to the fork. After this, pressing on the fork, we engage second gear - now the shafts are fixed.

In the final stage, loosen the bolt securing the gear on the secondary shaft, then unscrew the nut securing the gear on the input shaft, remove the retaining ring and unscrew the already loosened mounting bolt. We dismantle the fork along with the fifth gear clutch. Using a special puller, remove the drive gear, and similarly dismantle the gear on the secondary shaft. Having replaced a set of new gears with the desired gear ratio, we carry out the installation strictly in the reverse order.

It is important to remember that after installing all the removed parts, you should fill the gearbox with oil in accordance with the vehicle's operating instructions

Work progress

The work is carried out in the following order:

The first step is to remove the engine crankcase protection. It is secured with six bolts, for which a 10mm wrench is used.
If the gear is replaced without using a special lift, then the car must be jacked up from the front left wheel, and then some stable objects must be placed under the body in case the jack “collapses” and Largus falls. After this, the left front wheel and the right front fender liner are removed. After this, the gearbox oil is drained. To do this, use a size 8 wrench to loosen the drain plug and remove it, then drain the oil.
After this, the left front shield that protects from dirt is removed, as well as the bolts that secure the power steering pipeline to the support and directly to it.
The next step is to remove the connecting rod from the left suspension subframe. To do this, loosen the nut and remove the bolt, then with a sharp movement, unscrew the rod.
The next step is to remove the light wiring from the engine crankcase. To do this, you need to disconnect the high beam connector and remove the wiring from the rear cover of the gearbox housing. It is under it that the fifth gear gear is located.
After the wiring is removed, you need to remove the rear crankcase cover, which requires unscrewing the bolts.
The cover should be removed carefully, since during removal there is a possibility of damaging the small plastic groove through which gearbox oil is supplied to the gears.
In addition, you need to remember how much the fifth gear mounting pin protrudes; during assembly, it must be installed in the same way. This is important not only for Largus cars.
It must be driven into the fifth gear shift fork using a hammer and a punch.
The next step is to block the primary and secondary shafts. To do this, use the gearshift lever to engage first gear. After that, use the fifth gear fork to activate it. This procedure makes it easier to remove the input shaft nut and secondary shaft bolt. They are tightened tightly, so you will need a good wrench. After removing them, the input shaft nut is removed. This can be done with a screwdriver.
The next step is to remove the secondary shaft bolt. This is best done using a TORX head.
After removing the primary shaft nut and secondary shaft bolt, the fifth gear fork is removed. Then the synchronizer gear hub is removed. This is best done using a puller. It is worth noting that categorical care is needed here, since there is a possibility of damage to the gear itself.
Then, no less carefully, the remaining parts are removed. This can be done without the help of tools. It is important to remember their location for subsequent assembly of the unit.
For the next step, the secondary shaft bolt must be screwed back a few turns. He will have to play the role of support for the puller.
The puller itself must be installed so that on one side it rests on the shaft bolt, while its legs go under the gear teeth. If the puller is installed correctly, removing it will not cause any problems. During the process, it will only be necessary to unscrew the bolt by one and a half turns of thread, since during extraction the gear will rest against it.
After the fifth gear gear is removed, you need to inspect all parts for faults, as they may need to be replaced.
Assembly is carried out in reverse order. First, you should clean the entire gearbox structure from dirt, both outside and inside. It is necessary to clean the splines of the gears and shafts with which they will fit, and then apply a fixing compound to them.
The gear is seated and tapped using a rubber mallet. In this case, the blows must be applied along the axis of the shaft, so that it does not warp.
The synchronizer clutch should be oriented towards the gearbox housing - the sharp ends of its teeth should be turned in this direction.
Before installing the fork, you must engage fifth gear using the lever. After this, to ensure the alignment of the holes, the lever is switched to neutral mode, and the holes themselves are centered using a screwdriver.
Then the fifth gear pin is inserted. As stated, it should perform the same as before disassembly. After this, the rear crankcase cover is put on, the wiring is returned to it, which is connected to the rear light switch connector. The connecting rod returns to its place, and its fastenings are tightened. After this, the power steering line, front mudguard, right front fender liner, front wheel and crankcase protection are returned to their place.

After completing the assembly process, you need to fill the gearbox oil, and the Largus car will be ready for use.

Source: ladaautos.ru

Gear replacement process

We place the car on an overpass or hang it with a lifting device, after which the fifth gear replacement begins.
Remove the wheel from the front left side of the Lada Largus.
We dismantle the plastic protective panel for the engine pan, removing the latches and pistons from the mounting sockets.
We proceed to unscrewing a pair of bolts securing the subframe bracket. In this case, we completely unscrew the upper mounting bolt, and only loosen the lower one a little in order to further move the bracket to the side.
We also release the fastening components located near the power steering pump and the transmission unit housing.
Now we remove the reverse activation connector.
We drain the oil from the box, having first unscrewed the plug on the drain neck and the three bolts holding the rear cover of the unit.
We remove the specified cover without damaging the lubrication chute.
Carefully knock out the fixing pin that holds the 5th speed fork with a rod.
To ensure the ability to unscrew the gear fasteners, we resort to the need to lock the transmission shafts (primary and secondary). For this purpose, we pull back the fork and activate first gear.
Using a puller (with two “claws”) we dismantle: the clutch, the synchronizer fork, the hub and the fifth gear itself.
Now we move on to the same manipulations with the bolt and gear located on the secondary shaft of the Lada Largus.
We replace the gears with prepared analogues and put everything back in place.

During installation, we recommend that you adhere to the rules below.

We observe the tightening torques of the nuts: 80 Nm on the secondary shaft and 190 Nm on the primary shaft.
We subsequently replace the oil in the transmission unit.

Reliability jr5

It’s difficult to praise the mechanical JR5 in any way, but there’s nothing particularly to reproach either. The unit itself is structurally simple, often hums, and the clarity of gear shifting leaves much to be desired. Over time, it requires overhaul or, in severe cases, replacement due to the destruction of key mechanisms. Often, car owners have to disassemble the box because the 5th speed refuses to turn off.

A roller bearing with a plastic cage on the secondary shaft is another weak point of the JR5 mechanics. The separator often falls apart even at short mileage, which leads to balls clumping together. At a minimum, the manual transmission starts to hum, but there have been cases when balls got caught between the gears. The deficiency was eliminated after the JR5 modernization.

Many problems can be avoided if you follow the manual transmission maintenance regulations and use original oil. It is advisable to change the working material of the box every 50-60 thousand kilometers. TranselfTRJ 75W-80 is suitable for replacement. After passing 10-15 thousand km, it is necessary to take control measurements of the fluid. In general, the box is old, moderately reliable, but not perfect. With the right approach it will last a long time and can be repaired without problems.

Characteristics of gearboxes in different modifications of Lada Largus

The above models of gearboxes have various modifications designed for installation on certain machines. For example, the JR5 517 gearbox is installed on a van with K4M and K7M engines. The JR5 549 is combined with the K4M engine in both a five- and seven-seat van. The JR5 551 gearbox works with the eight-valve engine on the station wagon, and the JH3 540 modification is usually installed in the five-seater Largus with an eight-valve engine.

Both gearbox models are made of an aluminum alloy housing, in which are mounted:

differential;
final drive gear;
clutch housing.

Inside the Lada Largus gearbox housing there is a primary shaft with a set of drive gears and a secondary shaft with driven gears located next to it. To ensure coordinated operation of the primary and secondary shafts, synchronization rings are installed on them. The difference between the variations of speed boxes lies in the gear ratios between the primary and secondary shafts. The difference between the JH3 and JR5 models is the design of the clutch and gear shift control.

In the JR5 model, the transmission of force to the release bearing is carried out by a hydraulic system, which includes the main and working cylinders. The gearbox is controlled by two cables connected to the gear shift knob. At the same time, the cables are not interchangeable; each of them has its own functional purpose.

Before deciding on the purchase of a gearbox, it is necessary to evaluate the features of the automatic and manual transmission. A car with an automatic transmission has a number of advantages over a manual transmission, but it also has undeniable disadvantages.

Advantages and disadvantages of automatic transmission Lada Largus

Advantages	Flaws
Excellent handling	Expensive repairs
Good acceleration dynamics	Frequent malfunctions
Multiple speed shift modes	High price
Ease of driving in urban environments	Inability to start the car when the battery charge is low (from a pusher)

Therefore, before buying a Lada Largus with automatic transmission, you should weigh the pros and cons. In particular, it is necessary to understand in what conditions the car will be used most often.

Manual gearboxes Lada Largus

From the very beginning of production, the car was equipped with a manual transmission-5. The transmission ensures optimal transmission of torque from the engine to the drive wheels. Depending on the power and torque of the engine, the Lada Largus is equipped with either a JH3 540 manual transmission or a similar JR5 unit. The first type of manual transmission is designed for a 5-seater station wagon with a K7M engine under the hood. There are several versions of the JR5 mechanics:

JR5551 – for a car with a 7-seater body and a K7M engine;
JR5549 – for the version with a 5- and 7-seater body and with a K4M engine;
JR5517 – for van with K4M and K7M engine.

The operating principle of the above units is almost identical and consists in connecting gears with different numbers of teeth. The main task is to ensure a change in torque in strict proportion to the gear ratio. There are several levels of boost for Lada Largus engines:

Gear replacement process

We place the car on an overpass or hang it with a lifting device, after which the fifth gear replacement begins.
Remove the wheel from the front left side of the Lada Largus.
We dismantle the plastic protective panel for the engine pan, removing the latches and pistons from the mounting sockets.
We proceed to unscrewing a pair of bolts securing the subframe bracket. In this case, we completely unscrew the upper mounting bolt, and only loosen the lower one a little in order to further move the bracket to the side.
We also release the fastening components located near the power steering pump and the transmission unit housing.
Now we remove the reverse activation connector.
We drain the oil from the box, having first unscrewed the plug on the drain neck and the three bolts holding the rear cover of the unit.
We remove the specified cover without damaging the lubrication chute.
Carefully knock out the fixing pin that holds the 5th speed fork with a rod.
To ensure the ability to unscrew the gear fasteners, we resort to the need to lock the transmission shafts (primary and secondary). For this purpose, we pull back the fork and activate first gear.
Using a puller (with two “claws”) we dismantle: the clutch, the synchronizer fork, the hub and the fifth gear itself.
Now we move on to the same manipulations with the bolt and gear located on the secondary shaft of the Lada Largus.
We replace the gears with prepared analogues and put everything back in place.

During installation, we recommend that you adhere to the rules below.

We observe the tightening torques of the nuts: 80 Nm on the secondary shaft and 190 Nm on the primary shaft.
We subsequently replace the oil in the transmission unit.

Procedure for replacing 5th gear

First, you should place the vehicle on a lift or stand, and then dismantle the front, left wheel. Next, the sequence of work will be as follows:

By carefully removing the latches and pistons, the plastic shield that protects from dirt is released.
Unscrew 2 bolts on the subframe bracket: the top one completely, the bottom one loosened a little and then moved to the side of the bracket.
The fasteners located in the area of the power steering and gearbox are released, followed by the removal of the connector from the reverse switch.
Afterwards, you need to drain the oil by first unscrewing the drain plug and 3 bolts located on the back of the gearbox cover.
Now you need to carefully dismantle it, being careful not to damage the lubrication chute. The 5th gear fork retainer (pin) is carefully knocked out with a rod.
Next, you will need to block the primary and secondary shafts, which will make it easier to unscrew the fasteners on the gears. To do this, the fork is pulled back and the first speed is turned on, followed by removing the nut on the input shaft.
Using a two-jaw puller for convenience, the clutch, synchronizer fork, as well as the 5th speed hub and gear are dismantled.
Now it’s the turn of the bolt on the secondary shaft to remove the gear. All.

All that remains is to replace the necessary gears and carry out careful assembly in the reverse order. It is recommended to take into account several rules during installation. For example, using a liquid fixative, process the splines on the drive gear. The nuts of the secondary and primary shaft should be tightened to 80 and 190 Nm, respectively. You will definitely need to replace the oil in the gearbox with a fresh copy.

Features of fifth gear on Largus

Along with the above malfunctions, Largus owners often have a desire to improve the performance of their car, or more precisely, to adapt it to personal requirements. In the main modification, the Lada Largus gearbox comes with a 16-valve engine. The fifth gear ratio (TR) is 0.892. This indicator indicates that the car can move confidently both in city traffic and outside the city. It easily picks up fifth gear from 50 km/h and dynamically reaches its upper speed limit, so there is almost no need to switch to fourth.

However, when driving for a long time at a speed of 90-100 km/h, increased noise occurs and increased fuel consumption is observed. This situation can be corrected by replacing the two fifth gears on the input and output shafts. Replacement takes place with gears that have a lower gear ratio, therefore, fewer teeth. These pairs of gears are sold in aftermarket gear ratios of 0.820, 0.795, 0.756 and 0.738. Experiments on replacing fifth gear gears were carried out by both AvtoVAZ and numerous car enthusiasts.

When using a pair with an IF of 0.820, the fifth gear becomes slightly shorter, as a result the car easily picks up a speed of 60 km/h both on an incline and when driving on a straight road. The noise from the gearbox operation becomes significantly lower.

Gears with a gear ratio of 0.795 slightly change the maneuverability of the Largus. When overtaking, you need to engage fourth gear more often to gain the desired speed. It is often necessary to switch to four when driving on the ground in a loaded car. As for the installation of gears with an IF of 0.756 and 0.738, they aggravate the listed disadvantages.

It is best to replace the factory gears with a pair with a 0.820 ratio.

Reviews about 5th gear gears

Based on feedback from owners of the Lada Largus car, as well as reviews, trials and tests, we have compiled a comparison table:

PCH-5	Shifting to 4th gear	Hill climbs in 5th gear	Confident acceleration in 5th gear	Summary
0,892	Rarely	Confident, even with a load	from 50 km/h	Loud engine noise on the highway. Only for the city and with load.
0,820	Sometimes for fast accelerations	Confident, even with a load	from 60 km/h	The howl of the engine on the highway has become less, but you still get tired of it. When trips are more often around the city and less often on the highway.
0,795	During fast acceleration	Confident, but without a load	from 65-70 km/h	To switch to 5th gear, you have to accelerate a little longer in 4th. The hum and howl from the engine and gearbox are within normal limits. Ideal city/highway option.
0,756, 0,738	Often	You should add gas	from 75-80 km/h	The gap between 4th and 5th gear is significant. Minimum noise level from the engine and gearbox on the highway. Suitable for driving on flat terrain with occasional overtaking.

This modification is primarily used to reduce engine speed when driving in 5th gear. Fuel savings after such upgrades are not significant. If fuel consumption with PCH-5 0.892 was 7.4 l/100km, then with 0.795 it will decrease by 0.3 l and amount to 7.1 l/100km. If you expect that replacing the 5th gear of Largus will pay off in terms of gasoline savings, then you will have to wait several years.

How do you feel about this modification of the Lada Largus gearbox? Is it worth changing the 5th gear driven and driven gears? What gear ratios are best to choose? Let us remind you that you can increase the speed of the car in other ways, for example, by installing wheels of a different diameter. And to make long trips more comfortable, you can add an armrest.

Keywords: soundproofing Lada Largus | Lada Largus engine | Lada Largus gearbox

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About the disadvantages of gears

During a thorough and repeated analysis carried out by service centers, as well as based on numerous reviews from owners, it was established that such a malfunction is typical for the LADA Largus modification, which is equipped with a popular 1.6-liter engine (“K4M”) with a 16-valve head design . It is in this version of the engine tandem with the gearbox that the same gear can cause discomfort to the owner, which is why the 5th gear gear is replaced. The manufacturer is also familiar with this shortcoming, which subsequently manifested itself in its desire to use different combinations of not only engines with gearboxes, but also different options for the main pairs in transmissions (see table).

An interesting fact is that the cargo version of the LADA Largus, the so-called “van,” in fifth gear is capable of achieving a higher maximum speed in comparison with its passenger counterpart. The manufacturer intended everything just the opposite.

The noise emitted by the 5th stage gear not only annoyingly penetrated into the cabin, but also caused increased fuel consumption due to the presence of increased friction in the corresponding gearbox unit. That is why many owners of the model replace the fifth gear.

Lada Largus

Over time, you get used to the shortcomings of the car you drive all the time. But there are exceptions to the rules. For two years now I have been using the Lada-Largus editorial station wagon and still cannot accept the heart-rending roar of its engine on country roads. On a long journey, you get tired of this tedious monologue, and the rising tachometer needle puts pressure not only on the psyche: you constantly think about increased fuel consumption. Judging by the numerous unflattering comments on thematic Internet forums, I’m not the only one who doesn’t like the too short fifth gear. Moreover, this problem mainly concerns the most popular passenger version with a 16-valve 1.6-liter K4M engine. Different boxes and main pairs are installed on Largus (see table). And in a passenger car with a sixteen-valve engine, fifth gear turns out to be the most high-torque. Even the van speeds faster in fifth gear. Although logically it should be the other way around.

t-03

0,820. The engine is no longer perceived as so elastic, but still within normal limits. You only have to shift to fourth gear for quick accelerations. Even with a full load and in fifth gear, the car easily overcomes climbs, and on horizontal sections it confidently picks up speed from 60 km/h. At the same time, it became significantly quieter at high speeds. The gain on fuel is insignificant.

Summary . A universal option for every day. Fifth gear is quite functional in the city, and driving on the highway has become more comfortable. We recommend that AVTOVAZ take this option as the base one.

0.795. My personal choice . Editorial "Largus" is rarely fully loaded, and on country routes I usually drive on roads with flat terrain. The number of shifts from fifth to fourth on the test route increased, but only slightly. When upshifting, I stayed in fourth gear a little longer before engaging fifth, and when overtaking, on the contrary, I began to shift from fifth to fourth more often.

Summary. Optimal for suburban highways, tolerable for trips around the city. If you load your car to capacity or drive on roads with long, steep climbs or frequent overtaking, choose the 0.82 option.

0.756 and 0.738 . We have not tested these options, but judging by our impressions of the 0.795 fifth gear box, they accumulate the shortcomings of the previous option. Elasticity will deteriorate, you will have to shift from fifth to fourth more often, and there will be a significant gap between these gears.

Summary . These options are convenient, for example, for driving on a flat and empty highway at a constant speed and rarely overtaking.

Checking the level and topping up

Before changing or adding lubricant, you should check the oil level in the box. This is not as difficult to do as many may think. If you have minimal experience and skills, you can easily cope with the task with your own hands. In the case of a Lada Largus car, for work you will need to take:

a syringe that will be used to add the missing liquid;
rags;
an empty container for several liters;
key square for 8;
oil similar to what is in the box.

Special syringes are used, available in auto parts stores. Do not confuse them with medical syringes, which are not suitable for such purposes. Special topping and filling tools have a hose that allows easy access to the filler neck. When everything is ready, you can begin to assess the amount of oil in the box and add the missing amount of lubricating fluid to the Largus gearbox.

The work is carried out according to the following algorithm of actions:

Remove the engine protection. People often call it the central mudguard. The essence does not change from the name. Find the filler plug, which can often be easily unscrewed with a square wrench. Before opening the cap, place an empty prepared container under it to avoid spilled puddles of oil. According to the standards, the level should be located slightly below the filler hole. If it is less, then you will need to add the missing amount of gear lubricant. A syringe pre-filled with oil is inserted into the filler neck. Gradually pour in the viscous liquid. At some point, lubricant will begin to flow through the hole.

Wait until it stops running completely, then wipe everything with a rag and screw the plug back into place. During the process of checking and topping up, pay attention to the condition of the rubber O-ring on the plug. If the machine is used for a long time and actively, the ring may wear out. It is better to replace it immediately, since a worn seal will break the seal and the oil will gradually leak out

Such a ring costs about 5 - 10 rubles, so serious expenses for such repairs will not be required.

It is better to replace it immediately, since a worn seal will break the seal and the oil will gradually leak out. Such a ring costs about 5 - 10 rubles, so serious expenses for such repairs will not be required.

If you did everything correctly, the oil is not leaking anywhere and the gearbox is functioning normally, then the transmission fluid level is sufficient and you can continue to operate your car.

Brakes

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Lada Largus

Replacing Largus 5th gear gear

The design of the Largus transmission allows you to change the 5th gear gears without disassembling the entire gearbox or even removing it from the car. You will need a gear puller, a hair dryer and two screwdrivers. If you have the necessary tools, the process takes no more than 2-3 hours. Video instructions:

When replacing gears with their own hands, car enthusiasts most often encounter difficulties when dismantling a small gear. Removing it without a special puller is not so easy, because... it sits on the shaft using a thread locker. In this situation, a hair dryer can be useful; after heating, the part will easily slide off. Don't forget to fill in new transmission oil.

Features of the JH3 gearbox

JH3 gearbox parts

The JH3 gearbox on the Lada includes a clutch housing, gearbox, and rear crankcase cover. Thanks to the clutch with a bearing located in the box, the clutch in the box is turned on and off. When changing speed modes, no extraneous noise is created. The Lada Largus gearbox provides the ability to accelerate quickly. The average working life of this box is approximately 250,000 km.

The gearbox control drive includes a rocker and a lever. It should be noted that there is a bevel differential. There is a drain plug at the bottom of the crankcase. It is controlled by a rigid rod. Its body is made of aluminum alloy. The JH3 540 version can be found in the five-seater Largus, which has an 8-valve engine.

Replacing the Lada Largus gearbox

The need to dismantle the box arises every time it is necessary to replace or repair the clutch on a car. On the Lada Largus, the gearbox is mounted in one unit along with the differential and final drive.

Replacing a transmission is one of the most difficult types of car repairs. We strongly recommend using the services of specialized technical centers for this.

When is Largus gearbox repair or replacement needed?

It is not always easy for an inexperienced driver to understand this. The gearbox and clutch work in tandem, and the symptoms of clutch and gearbox failure are often similar. Typical manifestations and causes of gearbox breakdowns:

Increased vibration and extraneous noise in the gearbox. Possible weakening of the gearbox or engine mounting supports, insufficient oil level or mismatch of its brand, critical wear or damage to bearings or gearbox gears
Oil leaking from under the gearbox. Damage or destruction of O-rings or seals
Extraneous sound when changing gears, difficulty switching them on. Breakage of gear shift rods, inappropriate oil filled, weakened synchronizer springs, wear of blocking rings or synchronizers themselves
Spontaneous gear shutdown. Large gap in synchronizer clutches, breakage of their springs or wear of gear shift forks

Only a technician can tell you the preliminary cause of the breakdown after inspecting and diagnosing the car. After dismantling and disassembling the gearbox, we will be able to accurately determine the malfunction and eliminate it.

Replacing fifth gear Largus

Largus has one not very pleasant feature - the gear ratio of the 5th gear is not very high.

Because of this, on long stretches on the highway, already at a speed of about 90 km/h, you have to turn the engine above 3000 rpm. Increases fuel consumption and noise inside the car.

Replacing the Largus 5th gear with another gear with a higher gear ratio will solve this problem.

The mechanics of our technical center will professionally replace 5th gear on a Lada Largus in literally 1.5-2 hours. Replacement is carried out without completely dismantling the gearbox; partial disassembly directly on the car is sufficient. The design of the gearbox allows this to be done, since the 5th gear is an overdrive and is located separately from the other gears.

There are several different factory 5th gears with different ratios that can be installed in the Largus gearbox.

But the acceleration dynamics will become even worse and you may have to switch to lower gears more often when overtaking. This must be taken into account when deciding whether to replace the 5th gear.

If you decide to replace the Largus fifth gear, our mechanics will offer you the most optimal replacement option among all available.

All work is performed only on modern equipment using professional tools and devices. We always use new fasteners and use special products for fixing, degreasing and cleaning threads. You can be sure of the excellent quality of all work performed.