Replacing the rear bridge of the VAZ rear axle gearbox 2107

Any vehicle assembly may be unusable for a variety of reasons. It can happen with the glands in the rear axle of the VAZ 2107 rear axle. The overwhelming majority of motorists consider the replacement of these seals to the work extremely difficult and immediately send the car to the car service. In this article we will try to prove to the reader that you can change such a gland with your own hands.

Appointment of rear axle gear

Rear bridge reducer

You cannot directly supply torque from the engine to drive wheels: they will rotate too quickly and it will be impossible to control the machine. It is necessary for some intermediate link between the engine and wheels. This intermediate link is the rear axle gearbox. His task is to get a torque from the engine and serve on the driving wheels, having previously distributed it depending on the distance passable by the wheels.

Causes of replacement of the gland and symptoms of malfunction

The glands in the gearbox change for one reason: they begin to leak. The gland can be erected, to break or be poor quality from the very beginning, which will inevitably affect its service life. In addition, the tightness of the gearbox can be broken due to improper installation, as a result of which the glands are squeezed too much. It is possible to determine the fault by the following features:

Required tools and consumables

1. New rear axle gearbox.
2. Set of attic keys.
3. Dynamometer.
4. Dynamometric key.
5. Kapron thread 50 cm long.
6. 2 long bolts for 10.
7. Pliers.
8. A hammer.
9. Trumper pipe with a diameter of 4 cm and 10 cm long.
10. Capacity for draining oil.

Sequence of actions when replacing

Video: How to carry out work on VAZ 2107

Important nuances

• Above mentioned the indications of the dynamometer, and this is not accidental. The tightening of the flange is a very responsible process, and it is performed only with a torque wrench. This avoids excessive squeezing of the gland, which leads to a violation of the tightness of the entire gearbox. This is done like this: if at the first measurement, the force on the dynamometer was 2.8 - 3 kg, then the force on the dynamometric key during tightening should not exceed 6.3 kg. If there were 4.3 kg on the dynamometer, there should be no more than 9 kg on the key when the dynamometer showed 2.7 kg, and the key when tightening shows 9 kg or more, it means that the adjusting gearbox bushing is completely worn out and needs In urgent replacement.
• After removal, the flange should be thoroughly examined on the subject of strong blows and cracks. If any, the flange must be replaced. If this is not done, the new seal will be in disrepair very quickly.
• Before you drive the gland with a tube, it is recommended to lubricate it with lithol. It greatly facilitates the landing of a new gland to a regular place.
• Applying shocks with a hammer over a pipe, do not need too much to zealous: with a strong blow, the pipe easily reflects the gland.

As you can see, by itself, the replacement of the gland takes no too much strength, and it is not so difficult to get to it: it's enough to put the car to the observation pit with good lighting. But tighten the flange so that it does not crush the new gland - the task is more complex. That is why the car owner requires a dynamometer and a special key, without the readings of which the rear axle reducer is categorically not recommended.