33 10 010 Removing And Installing/Replacing Rear Differential
33 10 010 Removing and installing/replacing rear differentialSpecial tools required:
Warning!
Danger of injury!
Rear axle final drive must be lashed with tensioning strap 33 5 206 to prevent it falling out when the output shafts are forced off.
Important!
When replacing rear differential:
New rear differential is not filled with oil.
Add rear differential oil after installing.
When removing/reinstalling the rear axle final drive, both output shaft radial shaft seals and the circlip on both output shafts must be renewed!
Necessary preliminary tasks:
^ Remove propeller shaft on final drive.
Position special tool 33 5 200 on workshop jack.
Support rear axle final drive 33 5 200 with special tool.
Lash rear axle final drive with tensioning strap 33 5 206 to special tool 33 5 200.
Important!
Tensioning strap 33 5 206 must be pass through between output shafts and rear axle final drive cover!
Important!
Risk of damage!
To prevent the rubber mounts from overstretching when the bolts are pulled out, ensure the bolts remains in the rubber mounts.
Release screws (1).
Installation note:
Adhere to the installation sequence at the end of the document in order to prevent distortion of the rear axle final drive during installation and thereby avoid potential complaints about noise.
Release nut (1) and remove screw towards rear.
For E72: Remove screw towards front!
Installation note:
Adhere to the installation sequence at the end of the document in order to prevent distortion of the rear axle final drive during installation and thereby avoid potential complaints about noise.
Important!
Risk of damage!
Output shafts must not under any circumstances rest on swinging arms.
Tape off output shafts or place a cloth on swinging arm.
Note:
Observe the following procedure for removal of the output shafts!
- Slowly lower rear differential using workshop lifter.
- Turn rear differential to left side
- Press out right output shaft with special tool (see further operations) and feed out
- Swing out rear differential to right side
- Press out left output shaft and feed out
Important!
Special tools 33 5 120 and 33 5 125 must be inserted in all-round slot (1) on output shaft!
Press output shaft by jerks and jolts with special tool 33 5 120 from the rear axle final drive. Here, thrust piece of bolt 33 5 122 must rest on rear axle final drive.
Important!
In order to ensure correct locking of the output shaft in the rear axle final drive, make sure when driving in the output shaft that the tightening strap 33 5 206 is not located between the rear axle final drive and the dust plate!
Installation note:
Drive output shaft with special tool 33 5 125 and a rubber mallet into rear axle final drive.
Feed output shaft out of rear differential and tie up.
Installation note:
Replace shaft seal(s) for output shaft(s).
Important!
High installation forces indicate that the output shaft spline teeth are damaged or deformed!
Installation note:
Check gearing, replaced damaged parts if necessary.
Check dust plate (1) for damage, replace if necessary.
Replace retaining ring (2).
Coat contact surface (3) of output shaft with approved final drive oil.
Installation note:
Insert output shaft into rear axle final drive.
Pull out assembly protection ring at lug (1) until one of the two programmed rupture points gives.
Note:
Repeat procedure on the other side, remove rear differential with a second person helping from special tool and set down on a suitable surface.
Installation sequence:
1. Install rear axle final drive with workshop jack and special tool 33 5 200 in rear axle support
2. Insert bolts (1) (do not tighten down)
3. Insert bolt from rear and replace nut (2) (do not tighten down)
For E72: Insert bolt from rear!
4. Release tensioning strap, lower special tool 33 5 200 and move away
5. Tighten down screws (1)
Tightening torque 33 17 1AZ.
6. Tighten nut (2)
Tightening torque 33 17 2AZ.
After installation:
^ Fill rear differential with oil or check oil level and top up if necessary.
Replacement only:
^ With BMW Diagnosis and Information System under:
- Control unit functions
Perform functional check of transfer box (calibration)
