Removal and Replacement

Differential Clutch Oil Replacement

Removal Procedure

1. The hydraulic pressure in the differential clutch is very high. To prevent personal injury, wait for at least 10 minutes before removing any parts from the differential clutch.

Note
The vehicle should be as level as possible when performing this procedure.

Note
To adjust the differential clutch fluid to the proper level without draining, go to step 12 of installation.

Raise the vehicle and support the vehicle. Refer to Lifting and Jacking the Vehicle.

2. Remove the vent hose (1).





3. Warning
It is very important to observe maximum cleanliness when working on the differential clutch. Dirt particles can seriously damage the function and service life of the differential clutch

Remove the differential clutch cover to drain the differential clutch.

4. Remove the vent hose fitting from the differential clutch cover.





Installation Procedure

Note
Both the fluid level and clutch motor current parameter requirements must be met to ensure the differential is filled to specifications.

1. Install the differential clutch cover.
2. Refer to Fastener Caution.

Note
The following tighten procedure MUST BE PERFORMED TWICE to ensure the proper sealing around the accumulator and the filter.

Install the differential cover bolts and tighten to 6 Nm (53 lb in) in a star pattern and repeat this torque sequence twice to ensure proper sealing around the accumulator and the filter.

3. Warning
Fluids for the differential clutch and the rear axle are different. The fluids must never be mixed or interchanged or vehicle damage will result.

Fill the differential clutch with 350 ml (12 ounces) of the proper differential fluid through the vent hose fitting hole.

4. Remove the supports and lower the vehicle.
5. To stabilize the oil level, let the vehicle rest for 10 minutes with the ignition off.
6. Start the engine and allow to run for 5 minutes at idle.
7. In park, cycle the throttle to wide open briefly 5 times to cycle solenoids to purge air.
8. Shut the vehicle off.
9. Raise the vehicle.
10. Remove the differential clutch level inspection plug (1).





11. The differential clutch fluid should be level with the bottom of the differential clutch fluid level inspection plug hole.
12. If needed, install the differential clutch level inspection plug and add 50 ml (1.7 ounce) through the vent fitting hole. Repeat step 4 through 11.
13. Install the breather hose connection (2) and tighten to 14 Nm (10 lb ft).





14. Install then vent hose (1).
15. Lower the vehicle.
16. Install the scan tool.

17. Note
When the clutch pump motor cycles from OFF to ON the current will also cycle from 0 mA to 2500-3500 mA. DTC C0407 64 is set when the pump current is CONSTANTLY BELOW 2500 mA.

With engine running, observe the scan tool Rear Differential Clutch Pump Motor Current parameter. The parameter display should be between 2500-3500 mA when the pump is on. If the parameter is below 2500 mA, repeat step 12.

18. If the parameter is between 2500-3500 mA, check the differential clutch is not overfilled. If the differential clutch fluid level is too high, remove the fluid level inspection plug and allow the excess fluid to drain.