Differential
To Remove And Dismantle1. Remove the final drive cover.
2. Remove the two differential bearing housings. Save the shims and remove the differential.
3. Remove the speedometer drive and press out the differential bearings. Use tools 89 96 084, 87 90 768 and 89 95 177. For particulars of changing the outer bearing races, see under "To dismantle the inner universal joint driver".
4. Remove the dowel securing the differential pinion shaft and carefully tap out the shaft. Save the pinion and the wear washers.
5. Remove the crown wheel bolts and remove the crown wheel.
To Assemble And Fit
1. Replace any worn or damaged parts by new ones.
2. Press the bearings into place and fit the speedometer drive. Use tool 87 90 487.
3. Fit the differential and differential bearing housings into the gearcase. Check the bearing preload and adjust the shimming as necessary (see under "Inner universal joint driver with differential bearing housings").
4. Fit the differential and bearing housings.
5. Fit the crown wheel, apply locking compound to the bolts and tighten them to the specified torque.
Tightening torque: 90 +/- 10 Nm (66 +/- 17 lb ft.)
6. Place the pinions and wear washers in their appropriate positions and insert the differential pinion shaft. Fit the dowel.
7. Fit the differential and the differential bearing housings into the gearcase.
8. Check and, if necessary, adjust the crown wheel backlash (see under "Inner universal joint driver with differential bearing housings").
9. When finally fitting the differential bearing housings, apply sealing compound to the 12 bolts.
Tightening torque: 23 - 28 Nm (17 - 21 lb ft.)
10. Fit the final drive cover.