Cuff drive gear
Removing
Attention! If the vehicle is equipped with electronically controlled air suspension, turn off the suspension height control switch.
1. Raise the rear of the vehicle and place secure supports under it. Install wheel chocks under the front wheels to prevent the vehicle from coming off the wheel. Release the parking brake and place the transmission in neutral.
2. Apply reference marks (in front of each other) on the flange of the cardan shaft and the flange of the differential drive gear, then unscrew the bolts securing the cardan shaft to the flange (see paragraph 4). Hang the driveshaft with a piece of wire (do not let it hang on the intermediate support).
3. Using a hammer and center punch, knock out the caulking of the pinion flange nut.
4. To keep the pinion flange from moving when the self-locking nut is loosened, a flange holding tool is required. A chain wrench can also help.
5. Remove the pinion nut.
6. Remove the flange. To remove it, it may be necessary to use a puller with two jaws, which should be inserted behind the flange. Do not try to pry the flange with a lever or remove it by hitting the rear or end of the pinion shaft with a hammer.
7. Remove cuff and discard.
Installation
8. Lubricate the sealing lips of the new seal and fill the gap between the lips of the seal with wheel bearing grease, and then evenly insert the seal into place using a special mandrel or a large socket. Make sure that the cuff enters the body without distortion and is inserted as far as it will go.
9. Install the pinion flange; if necessary, tighten the gear nut to put the flange in place. Do not try «drive» flange into place with hammer blows. Tighten the nut to the specified torque specified in Specifications at the beginning of this chapter.
10. Using a torque wrench (indicator or pointer type), measure the torque required to turn the gear and tighten the nut in small increments (no more than 12 Nm), until the pinion shaft bearing preload matches the value given in the Specifications at the beginning of this chapter. If the maximum torque specified in the Specifications at the beginning of this chapter is reached before the prescribed preload is achieved, the differential bearing spacer must be replaced.
11. Once the correct preload is achieved, caulk the tab on the nut into the groove on the pinion shaft.
12. Connect the cardan shaft to the drive gear flange (see paragraph 4). Check the oil level in the differential and add oil if necessary to bring the level up to the correct level (see chapter 1).
Cuffs semiaxes
Attention! If the vehicle is equipped with electronically controlled air suspension, turn off the suspension height control switch.
13. Raise the rear of the vehicle and place secure supports under it. Place wheel chocks under the front wheels to prevent the vehicle from rolling off the stands. Release the parking brake and place the transmission in neutral.
14. Remove axle shafts (see paragraph 2).
15. Gently remove the cuffs of the semiaxes from the side gears using a special puller or a large screwdriver. Be careful not to scratch the mounting holes for the cuffs.
16. Install each new cuff in its original place, using a special mandrel or a large end head. Make sure that the cuff enters the body without distortion and is inserted as far as it will go.
17. Lubricate the sealing lip of each new seal with multipurpose grease, and then install the axle shafts (see paragraph 2). Be careful not to damage the sealing lips of the new seals.
18. Check the oil level in the differential and add oil if necessary to bring the level up to the correct level (see chapter 1).