Drive/Propeller Shafts, Bearings and Joints: Service and Repair

NOTE: Special tools: 981 4215, 999 5971

When Replacing Viscous Coupling, Final Drive Or Final Drive Flange, Measure And Balance
- Checking axial runout
- Checking axial runout of final drive flange

NOTE: Ensure that the measuring surfaces are absolutely clean.

Install:
- plate 999 5971
- dial gauge with magnetic holder on plate
- Turn flange. Mark out the lowest point on the edge of the flange. Use a colored pen.
- Leave plate 999 5971 in place.





Marking Flange
- Mark out the lowest point on the edge of the flange.

NOTE: By lowest point we mean rearward in relation to the car, see Figure.





Install Viscous Coupling
- Check that the flange and viscous coupling mating surfaces are absolutely clean.
- Align viscous coupling marking. The marking is a punched cross on the edge of the flange (Figure). Align marking with the mark on the final drive flange. Align markings as close as permitted by the holes.
- Use new screws. Lightly tighten crosswise and then crosswise to 50 Nm (37 ft.lb.).





Check Radial Runout On Viscous Coupling

NOTE: Ensure that the measuring surfaces are absolutely clean.

- Install dial gauge with magnetic holder on plate 999 5971.
- Turn viscous coupling and mark out the highest point with a colored pen. Make a note of the reading. Remove measuring equipment and plate 999 5971.

NOTE: If runout exceeds 0.04 mm (0.00157"), continue with Balancing Shaft Table

NOTE: To install torque tube and flange, refer to Differential. Service and Repair





Installing Balancing Clamp
- Install balancing clamp on visco-differential Remove old balancing clamps.
- To minimize imbalance in the viscous coupling, balance as marked.
- Use the table below to determine the weight of the balancing clamp to be used.
- Place the clamp so that its weight is opposite the mark (the lowest section).
- Use pliers 981 4215 to tighten clamp
- If runout is between any of the following values, use the nearest value in the table.

Balancing Clamp Table





NOTE: To install torque tube and flange, refer to Differential. Service and Repair