Two Speed Rear Axle Shift Motor Replacement (HPZ)

Two Speed Rear Axle Shift Motor Replacement (HPZ)

Removal Procedure

1. Apply the parking brake.
2. Block the wheels.
3. Shift the two-speed rear axle shift switch to the LOW range.




4. Remove the two-speed rear axle wiring harness clip nut (1).
5. Remove the two-speed rear axle wiring harness clip (2) from the stud.




6. Disconnect the two-speed rear axle wiring harness connector.




7. Remove the two-speed rear axle shift motor nuts (1) and the washers (2).
8. Remove the two-speed rear axle shift motor (6).
9. Remove the two-speed rear axle spring from the two speed rear axle shift fork (4).
10. Remove the two-speed rear axle shift fork seal (5) from the differential carrier housing (3).

Installation Procedure




1. Install the two-speed rear axle shift fork seal (5) onto the differential carrier housing (3).
2. Install the two-speed rear axle shift fork spring onto the shift fork (4).




3. Apply a thin coat of rear axle lubricant to the shift fork and the two-speed rear axle shift motor lever. Refer to Fluid and Lubricant Recommendations [1][2]Fluid Type Specifications for the rear axle lubricant specifications.





Important: Ensure that the two-speed rear axle shift motor lever engages with the two-speed rear axle shift fork (4).


4. Install the two-speed rear axle shift motor (6).

Notice: Refer to Fastener Notice in Cautions and Notices.

5. Install the two-speed rear axle shift motor washers (2) and the nuts (1).

Tighten the nuts (1) to 74 Nm (55 lb ft).




6. Connect the two-speed rear axle wiring harness connector.




7. Install the two-speed rear axle wiring harness clip (2) onto the stud.
8. Install the two-speed rear axle wiring harness clip nut (1).

Tighten the nut (1) to 1.9 Nm (17 lb in).

9. Turn the ignition switch to the ON position.
10. Verify proper operation of the two-speed rear axle.
11. Remove the wheel blocks.