DIY gazelle gear repair

• cut the bearings out of the gearbox
• wash the car
• insert external bearing races
• install the bearing caps in place
• then check if there are any gaps: they should not be and the volume should sit very tightly

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Skopee will just bend the rear axle. Because of this, there is a change in the field, thus increasing the load on the differential.

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There comes a time when there are extraneous noises, howling, rustling, grinding in the main gear of a Gazelle car, the gearbox heats up. This is a reason for an urgent inspection of the liner for the presence of backlash and oil, for the presence of metal shavings, metal debris in it. Perhaps repairs and adjustments are needed, because the first signs of breakdown are obvious.

1. Advice. Before getting started, weigh your knowledge and capabilities. Maybe it's better to contact a car service! If you are confident in yourself, start.
2. For convenience and safety, install the gearbox on a stand, or clamp it firmly in a vice. Believe me, the repair of such a unit requires a rigid attachment and nothing will work on the table or floor.
3. The work begins with the installation of marks on the bearing caps and the crankcase. They are needed so that during assembly the parts fit strictly into place.

1. Unscrew the bolts with a 12 key and remove the yoke stopper. Using the "17" head, unscrew the four bolts of the bearing caps. They come off easily if you lightly tap them with a hammer.
2. With a special key - it can be made from a steel strip and a piece of round timber - or with a large screwdriver, unscrew and remove the yoke. The differential is free, dismantle it.

1. Now you need to remove the driven gear. To do this, unscrew 10 bolts with a "17" head, knock it down with a soft metal hammer or through a drift.
2. Before disassembling the differential box, put marks on both cups and unscrew 8 bolts with the head "13" separate them.
3. Remove the first half-axle gear.
4. Carefully knock out the crosspiece with a hammer and disassemble it, removing washers and satellites from their axles.
5. Remove the second gear.
6. To make it convenient to remove the flange, lock it, unscrew the nut and unscrew it with the "24." The flange can now be easily removed.
7. Pull the drive gear out of the crankcase and remove the spacer sleeve, the adjusting ring, and using the puller the inner and support bearings, the adjusting washer, and knock out the old oil seal from the body and remove the outer bearing.
8. Using a drift, remove the bearing races.

Wash all parts with kerosene, carefully inspect and reject. If necessary, replace them with new or used ones, but suitable for service. Remember that in a gear pair - the main gear - the gears do not change one by one. That's why they are a couple.

Assembling the gearbox is a complex and responsible process due to the presence of the necessary adjustments, for which special devices are needed. There is no point in describing them, since they are intended only for gearbox adjustments.

The time of using the assembled gearbox, which means its performance, depends on the quality of these works and the correctness.

GAZelle rear axle gearbox repair requires precise adjustments and it is desirable to carry it out in specialized services. If you are confident in your abilities, then especially for you we provide step-by-step instructions for adjusting the rear axle gearbox on GAZelle cars. Before starting repairs, read about the device of the gazelle rear axle reducer.

After removing the gearbox, we proceed to disassemble it, having previously clamped it in a vice. We unscrew the bolts that secure the locking plates and remove them.

It is worth marking the bearing caps so that in the future they do not confuse the places where they need to be installed. Unscrew the bolts with a 14 wrench, remove the covers.

We also remove the adjusting nuts and the outer races of the roller bearings.

Inspect bearings for suitability, label each outer race.

Check the backlash in the semi-axle gears, it should not exceed 0.5mm, otherwise the differential box will need to be replaced. Remove the bearing and unscrew the planetary gear.

We knock out the axis of the satellites and take it out.

We take out the drive shaft with the gear from the gearbox housing and knock out the inner ring of the roller bearing with a soft metal drift. We replace the adjusting sleeve with a new one.

Remove the adjusting ring.

Using a punch, it is necessary to knock out the outer rings of the bearings.

We wash over all the details, inspect. Parts must be replaced if they are chipped, cracked, or have shells. We polish the seizures with sandpaper.

Next, we start assembling. If all the parts are the same, then we only change the spacer sleeve and the oil seal. If something was changed on the main pair, then we also change the spacer washer, we select it according to the size indicated on the new shaft. We install a new ring and press in the inner bearing race.

We install a new spacer sleeve on the shaft and put it in the gearbox housing. We put a new oil seal. We put on the flange, tighten it with a new nut.

We collect the differential, put it in place. If backlash was found in the side gears, then thickened washers will be needed. We tighten the covers.

We make a special key for adjustment.

We start adjusting. We wrap the nut from the side of the driven gear until the gap disappears. We measure it with a caliper.

After tightening the second nut, tighten another 1-2 teeth. With the first nut, the gap is adjusted to 0.08-0.13 mm. We tighten both nuts until the distance increases to 0.2mm.

We turn the gear by hand and check the backlash - it should be the same in different positions. Install the locking plates and bolt them. The differential must be replaced if the backlash is not the same.

We examined the disassembly of the axle gearbox in the article - How to disassemble the rear axle of a Gazelle car

In this article, we will consider how to properly assemble and adjust the gearbox of the rear axle of a Gazelle car.

We assemble the main gear in the reverse sequence to disassembly, lubricating the bearings and gears with transmission oil.

Having installed the drive gear in the gearbox housing, tighten the flange nut with a torque of 16–20 kgfm using a torque wrench, while the gear must be turned to correctly install the rollers in the bearings.

We install an indicator with a graduation value of no more than 0.01 mm on a tripod, resting its leg against the end of the flange and moving the shaft behind the flange, measure the axial play of the drive gear

To eliminate the backlash, take out the spacer ring installed on the gear shaft (see - How to disassemble the rear axle of a Gazelle car) and measure its thickness with a micrometer.

We select and install a new spacer ring.

It should be thinner than the removed backlash and an additional 0.05 mm thinner if the pinion bearings are new, or 0.01 mm if the bearings are the same.

In the absence of axial play of the drive gear, we check the torque of resistance to the rotation of the shaft with a special torque wrench with a division value of up to 0.5 kgfm.

With correct adjustment, the moment of resistance should be 15–20 kgssm for new bearings or 7–10 kgssm - if the bearings are left as they were.

With sufficient accuracy, the moment of resistance can be measured with a household steelyard by hooking its hook over the hole in the flange.

In this case, the required values ​​will be less - 3.8–5 kgf and 1.8–2.5 kgf, respectively.

If the moment of resistance is greater, we change the spacer ring to another one, thicker by 0.01–0.02 mm, if less, then we select a ring of smaller thickness.

The bolts of fastening parts of the differential box and the bolts of the driven gear, as well as their threaded holes, are degreased and covered with an anaerobic sealant before assembly.

We pay special attention to the cleanliness of the end surfaces of the gears and the gearbox of the satellites, the slightest dirt or nicks are unacceptable.

There are strange sounds in the axle shaft, which means the repair of the rear axle gearbox on the Gazelle on the nose. The topic becomes immediately clear to drivers of cars of class "C" and higher, since the concept of a differential is much closer to them. It all starts with an insignificant hum, and if you do not intervene promptly, then it will become stronger and stronger, eventually leading to the complete failure of the semi-axle or the bridge as a whole.

Due to the fact that few people know where which mechanisms are located, not everyone undertakes to repair the car on their own, although it's a trifling matter... Everything about everything will take an hour or an hour and a half, no special experience is required if you strictly follow our practical recommendations.

The repair of the rear axle gearbox on the Gazelle must be started only after you are 100% sure that the reason is in it, otherwise you will screw it up.

Adjusting the gearbox of the bridge on the Gazelle, how to adjust the gearbox on the gazelle with your own hands, adjusting the gearbox with your own hands gazelle

Adjustment of the axle gearbox on the Gazelle

The rear axle gearbox is one of the main components of the car, the basis of the differential. Its task is to distribute and change the torque that is transmitted from the engine and gearbox to the drive wheels. Structurally, this unit is very complex, so one day you may need to configure and adjust it. But more about everything.

The differential can have a different location (it all depends on the drive of the vehicle). For example, in four-wheel drive vehicles, the unit can be located in the gearbox or housings of both axles, in cars with front-wheel drive - directly in the rear axle housing.

Differentials, which are the driving force for the drive wheels, are called interwheel differentials. In vehicles with four-wheel drive, center differentials are installed, which are located between the two axles.

It is important to note that the differential is structurally in the form of a reducer. Depending on the type of gear transmission, the assembly can be worm, cylindrical and bevel. Each of them uses its own gear - worm, cylindrical and conical, respectively. The most popular today is the fourth type - hypoid gears. Their advantages include lightness, minimal size and reliability.

As we have already mentioned, the axle gearbox is a very complex unit that requires a special approach to adjustment and tuning. As a rule, such work must be carried out immediately after the repair of the unit or its disassembly. In the course of current operation, there is no need for adjustment work, because all clearances and bearing adjustments are made with perfect accuracy at the factory. If there is a bridge overhead, replacement of some parts or repair, then the adjustments go astray. They need to be restored.

During operation, wear of the teeth in the gearbox is possible - this is a common thing. This will increase the side play in the final drive. It would seem that adjustment can be a lifesaver. But no. Such intervention can only worsen the situation and lead to the appearance of unnecessary noise. Moreover, incorrect operation may result in tooth breakage, which will require replacement of the entire assembly.

Adjustment of the axle reducer is necessary in the following cases - when there is a strong hum during movement and backlash of the drive gear. At the same time, do not delay the work, because the lack of timely adjustment can lead to more serious destruction of the unit and its complete failure.

The Gazelle car is a reliable and high-quality transport, which is distinguished by its unpretentiousness and high carrying capacity. But the frequent use of equipment and its operation in extreme conditions (with a heavy load and on bad roads) often leads to problems with the gearbox. As a result, the problems that we mentioned above appear.

In such a situation, you can act in two ways - go to the service station and entrust the adjustment of the gearbox to professionals, and the second - do the work yourself. But be honest with yourself. If you have certain knowledge, strength and confidence, then you can carry out the adjustment work yourself and save money. In the absence of experience in such work and a knowledgeable person at hand, it is still better to give the gearbox to professionals in their field.

So, let's look at the features and subtleties of the adjustment:

1. Remove the rear axle gear and clamp it in a vise. Many newbies lay the knot on the table and begin disassembling. This is the wrong approach. First, it will be inconvenient to disassemble the gearbox in this case. Secondly, you will not be able to put all the necessary marks and will lose half of the details.
2. Be sure to mark the bearing caps. During assembly, this will allow correct installation.
3. Take the key on "14", unscrew the bolts and remove the covers.
4. Unscrew the adjusting nuts (not needed yet).

1. Remove the outer race from the roller bearings.
2. Inspect the bearings carefully for damage and reuse.
3. Check the axle gears for backlash. According to the rules, it should be no more than 0.5 mm. If the backlash is too large, then it will be necessary to change the differential box.
4. Dismantle the bearing and unscrew the planetary gear.
5. Knock out and take out the axis of the satellites.

1. After pulling the second nut, tighten it a few more teeth. After that, using the first nut, adjust the gap - it should be 0.08-0.13 mm.
2. Tighten both nuts until the distance increases to 0.2 mm.
3. Turn the gear and make sure that the backlash is approximately the same in all positions.
4. Replace the retaining plates and screw in the bolts.
5. If the play is different, replace the differential.

Of course, adjusting the bridge gearbox on a Gazelle is a very laborious process. When you complete all the necessary actions, you will spend about 3-4 hours, but you will save several thousand rubles. Good luck.

The design of the rear axle of VAZ, Gazelle, Sable and the like cars implies the presence of a gearbox in it. This unit carries out the transmission of torque, changes its direction. All this is entrusted to numerous gears, bearings, differentials.

Like any other complex part in a car, the rear axle gearbox needs periodic maintenance, as well as the repair of worn parts.

A sign of a gearbox malfunction may be:

1. increased noise from the rear axle. May be caused by beam deformation, wear of axle shafts and gears, oil leakage. If the noise appears immediately after the repair of the rear axle gearbox has been carried out, the fault is incorrect adjustment;
2. noise during acceleration of the car can serve as a signal of wear of the differential bearings, damage to the bearings of the axle shafts, and a low level of lubrication in the gearbox;
3. noise during acceleration and braking by the engine. The bearings of the drive gear are destroyed or badly worn out, incorrect clearances between the teeth of the gear wheels of the main drive;
4. cornering noise indicates wear on the semi-axle bearings, scuffing on the surface of the satellites axle, and also their tight rotation may be the reason;
5. knock at the moment of the start of movement. The clearance in the spline joint of the drive gear shaft and the flange is increased, the clearance of the main gears is increased, the hole for the pinion axle in the differential is broken.

To detect a malfunction of the rear axle gearbox at an early stage, it is recommended to periodically inspect it. for oil leakage, external damage and deformation, listen to extraneous knocks and noises.

Determining a gearbox malfunction at an early stage will save a very substantial amount. In the event of failure of one unit, it will necessarily lead to breakdown of other parts. So the oil leaked from the bridge due to a leak in the stuffing box will entail the replacement of the main pair.

Due to bearing wear, play appears in the rear axle gearbox, which will adversely affect the differentials. It is necessary to sort out the bridge after 100-150 thousand mileage, to identify and replace worn gears, broken bearings.

The repair and adjustment of the gearbox should be carried out by competent people who understand how it works and works. After all, if you incorrectly adjust the gearbox after repair, then after a very short time, you may again need to replace certain parts.

Nevertheless, let's briefly consider the procedure for disassembling the rear axle gearbox, using the example of a Gazelle car.

On the gearbox clamped in a yew, the bolts are unscrewed, which fasten the locking plates, after which the plates are removed. It is best to mark the bearing caps before removal in order to avoid confusion during assembly, the same is done with the outer bearing races. We inspect the bearings themselves for their suitability for further use.

The backlash of the semi-axle gears should not exceed 0.5 mm, if it is greater, then, most likely, it will be necessary to replace the differential box. Then you need to unscrew the planetary gear, knock out and pull out the axis of the satellites.

We remove the drive shaft from the housing and knock out the inner rings of the roller bearing through a drift or soft metal lining. After a thorough examination of all parts, we reject chips and cracks.

In the event that all parts of the gearbox remain the same, then you can limit yourself to replacing the oil seal and spacer sleeve. If any elements of the main pair have been replaced, then a new spacer is required. The inner bearing race is pressed onto the shaft, and after installing a new spacer sleeve, it is installed in the gearbox housing. Having installed a new oil seal and putting on a flange, we tighten it all with a new nut. We install the differential in place, tighten the bearing caps.

The answer to the question of how to adjust the rear axle gearbox is not very simple, and requires certain skills. Incorrect adjustment after assembly will negate all your efforts after repair. Therefore, if you are not completely confident in your abilities, we recommend that you contact a specialized service, where specialists will make the adjustment using special equipment.

We will not describe the entire adjustment process in this article; the most complete and visual guide is contained in the video.