Main main gear malfunctions:

- The bearings of the rear axle gearbox are worn out, their preload is broken, the landing is weakened (uniform noise from the rear axle)

- The teeth of the gears of the main gear are worn out, the lateral clearance in the engagement is broken, the scuffs on the teeth are a howl from the side of the rear axle, which decreases or disappears when the load is reduced (the gas pedal is released)

Rear axle dismantling

It is more convenient to work on the inspection ditch together.

Drain the oil (see How to change the oil in the gazelle rear axle gearbox)

Disconnect the driveline from the rear axle (see How to remove the Gazelle driveshaft).

We clean the main gear housing from dirt.

We take out the axle shafts on both sides of the car (see How to remove the rear wheels and axle shafts of the Gazelle car ).

Dismantling to repair the rear axle of a Gazelle carDisassembly for repair of the rear axle of a Gazelle car

With a key or a “14” head, we unscrew ten bolts securing the gearbox to the rear axle beam.

We remove the gearbox from the beam, while trying not to damage the gasket.

Dismantling to repair the rear axle of a Gazelle carDisassembly to repair the rear axle of a Gazelle car

For the convenience of work, we install the gearbox on the stand.

Remove the drive gear flange with the cuff.

With a punch, we mark the relative position of the differential bearing caps and their nuts, as well as the caps themselves relative to the crankcase.

Dismantling to repair the rear axle of a Gazelle carDisassembly for repair of the rear axle of a Gazelle car

Remove the drive gear flange with the cuff. Using the “12” key, we unscrew the bolts of the locking plates

Remove the locking plates

Dismantling to repair the rear axle of a Gazelle carDisassembly to repair the rear axle of a Gazelle car

Using a key or a “17” head, unscrew the bearing cap bolts

Remove the cover. Remove the second cover in the same way.

Dismantling to repair the rear axle of a Gazelle carDisassembly for repair of the rear axle of a Gazelle car

Using a special wrench or a large screwdriver, unscrew the adjusting nuts of the bearings

Remove the adjusting nuts

Dismantling to repair the rear axle of a Gazelle carDisassembly for repair of the rear axle of a Gazelle car

Remove the box of satellites with the driven gear.

If the bearings are not replaced, we mark their outer rings in order to install them in their original places during assembly.

Dismantling to repair the rear axle of a Gazelle carDismantling to repair the rear axle of a Gazelle car

The driven gear is mounted on the pinion box in only one position, therefore, to simplify assembly, we mark the relative position of the gear and the housing.

With a key or a “17” head, we unscrew 10 gear mounting bolts.

With light hammer blows through a soft metal drift, knock the gear off the satellite box and remove it.

Dismantling to repair the rear axle of a Gazelle carDisassembly for repair of the rear axle car GazelleDisassembly for repair of the rear axle car Gazelle

Special recesses are provided for the puller legs on the satellite box.

Installing a special puller

Remove the inner bearing rings with a puller.

Similarly, remove the second bearing.

Dismantling to repair the rear axle of a Gazelle carDisassembly for repair of the rear axle car GazelleDisassembly for repair of the rear axle car Gazelle

In the absence of a puller, insert a chisel between the end of the inner ring of the bearing and the differential box.

By striking the chisel, we move the inner ring of the bearing.

Insert two powerful screwdrivers (or mounting blades) into the resulting gap

We press the inner ring of the bearing with the cage and rollers.

With a center punch we mark the relative position of the parts of the differential box and the axes of the satellites.

Dismantling to repair the rear axle of a Gazelle carDisassembly for repair of the rear axle car GazelleDisassembly for repair of the rear axle car Gazelle

Using the “13” key, we unscrew the eight bolts connecting the parts of the differential box

Carefully tapping the soft drift with a hammer

Dismantling to repair the rear axle of a Gazelle carDisassembly to repair the rear axle of a Gazelle car

disconnect the box.

We take out the side gear from the removed half of the box

Dismantling to repair the rear axle of a Gazelle carDisassembly for repair of the rear axle of a Gazelle car

Remove the support washer.

We take out the axles together with the satellites and their washers

Dismantling to repair the rear axle of a Gazelle car

Remove satellites and washers from axles

Disassembly for the repair of the rear axle of the Gazelle car Dismantling for the repair of the rear axle of the car Gazelle Dismantling to repair the rear axle of a Gazelle car

Remove the second side gear

Remove the support washer.

We take out the drive gear from the gearbox housing (it can be knocked out with hammer blows through a soft metal spacer on the end of the shaft) and the inner ring of the front bearing.

Remove the spacer ring.

Dismantling to repair the rear axle of a Gazelle carDisassembly to repair the rear axle car GazelleDisassembly for repair of the rear axle car Gazelle

Compress the inner ring of the rear bearing from the gear shank

Remove the drive gear adjusting ring

Dismantling to repair the rear axle of a Gazelle carDisassembly to repair the rear axle car GazelleDisassembly for repair of the rear axle car Gazelle

With a drift we knock out the outer ring of the front bearing

Take out the ring.

Similarly, we knock out the outer ring of the rear bearing

Before assembly, we wash all parts in kerosene or diesel fuel and inspect them

Any cracks are unacceptable on the parts. Gear teeth should be free of scuffing, chipping and heavy wear.

The bearings should rotate easily without clicking or binding. On rollers and rings, chipping, chips and heavy wear are unacceptable.

Bearing cages must not be torn or deformed.

We replace damaged and worn parts. In any case, after a run of more than 100 thousand km, we recommend replacing the bearings, regardless of their condition.

When disassembling the axle, be sure to mark the parts, especially the outer races of the bearings. And when assembling, be guided by the article on adjusting the tightness and contact patch of the gears. Article - GAZ-2705 axle gearbox adjustment

Some drivers complain that it quickly breaks the bearings or the gears of the gear pair quickly fail. In everything, as usual, inattentive assembly and fitting of parts are to blame.

And also the correct running-in of parts. It is imperative that after assembly it is necessary to run in the parts of the axle gearbox. Do not give excessive load in the first 2 thousand kilometers after assembly.