2. Raise the rear of the car, install stands under the frame and gearbox housing.
3. Disconnect the cardan shaft from the gearbox and move it to the side.
4. Fix the reducer flange with a pry bar or a large screwdriver by screwing in the bolts and unscrew the pinion nut.
5. Remove the reducer flange (photo).
16.5 Removing the gearbox flange with a puller
6. Pry and remove the oil seal (photo).
16.6 Removing the gearbox seal
7. Lubricate the oil seal and the groove in the gearbox housing! grease. Carefully, avoiding displacement of the drive gear of the reducer, press in a new oil seal; so that its surface is flush with the crankcase (the lips of the stuffing box must face inward).
8. Install the gearbox flange, thrust washer and tighten the nut.
9. Having fixed the reducer flange, tighten the nut until the axial play of the drive gear disappears.
10. Turn the gearbox drive gear several times in both directions. Using a torque wrench with a scale of a few Nm, measure the amount of torque at which the drive gear begins to turn. This torque is equal to the preload in the pinion bearings and must be as specified in the Technical Data. If the torque is less than required, then tighten the reducer nut until the desired torque is reached.
Attention! The preload is provided by the pinion bearing spacer. If the preload is greater than recommended, the bushing will be deformed. In this case, the gearbox must be removed and the spacer sleeve replaced.
11. Further assembly is carried out in the reverse order.
12. When finished, fill the gearbox with oil.