Vehicles before change point in 1982
REPLACING LOCKING DIFFERENTIAL
Remove and install final drive - 33 10 010.
Drain oil.
Mount final drive on Special Tool 33 1 060 after
unscrewing oil drain plug (1) for this purpose.


33 10 010

Check total frictional torque prior to
disassembling, using Special Tool 00 2 000,
and note,
e.g. 180 Ncm (16 in.lbs.)

Remove left and right drive flanges.
Pull off drive flange with Special Tool
33 1 250.

Installation: Prior to installation of drive
flange, place wire snap ring (1) in groove of
differential case that both of its ends are
recessed in groove. This will prevent lateral
bending of snap ring. Press in drive flange by
hand and turn slightly, until wire snap ring
can be heard to engage.
Replace stretched snap rings.

Take off cover and remove locking differential.
Installation: Check O-ring, replacing if
necessary. Torque values¹).


¹) See Specifications

Detach ring gear from locking differential.
Pull off taper roller bearings through openings
in differential case with a standard puller and
Special Tool 33 1 305.
Installation: Install ring gear and taper roller
bearings cold.
Clean threads.
Install bolts with Loctite¹).
Torque values¹).
Check taper roller bearings, replacing if
necessary.


¹) See Specifications

Install new locking differential with ring gear.
Tighten cover mounting bolts uniformly to
15 ... 25 Nm (11 ... 18 ft.lbs.).
Check total frictional torque with Special Tool
00 2 000.
It must be same as frictional torque value noted
prior to disassembling, but not exceeding same.
Frictional Torque Too High: use thinner shim.
Frictional Torque Too Low: use thicker shim.

Adjust backlash and tooth contact pattern
with shims (2).
Change shims (2) from one side to other until
backlash¹) and tooth pattern are correct.
Never alter total thickness of shims.


¹) See Specifications

If tooth contact pattern is not correct, adjustment
must be corrected with shim X (see
"General Information on Tooth Contact
Patterns" on page 33-12/10).
Important: Check frictional torque before
unscrewing collar nut (1).
Always replace holding sleeve (2).
Adjust pinion bearing to frictional torque value
measured prior to disassembling.
Collar nut must be tightened to at least 150 Nm
(108 ft.lbs.).
If this value is not reached or exceeded, replace
holding sleeve (2) and repeat measurements.