The transmission fluid level is low.

Inspect the transmission fluid level and add the proper fluid as necessary.

Refer to Transmission Fluid Level Inspection .

The transmission contains the incorrect type of transmission fluid.

Drain the transmission fluid, then fill the transmission with the correct type of fluid.

Refer to Transmission Oil Drain and Fill .

The transmission shift control closeout boot is loose or damaged.

1. Inspect the transmission shift control closeout boot.
2. Position and tighten the closeout boot to specifications, or replace the boot as necessary.

Refer to Shift Control Shift Closeout Boot Replacement .

The transmission gears or bearing components are worn or damaged.

1. Remove the transmission.

Refer to Transmission Replacement .

2. Disassemble and inspect the transmission.
3. Replace worn or damaged components as necessary.

Refer to the Transmission Unit Repair Manual.

The rear axle differential internal components worn, damaged, or misaligned.

1. Inspect the rear axle differential.
2. Repair or replace the rear axle differential as necessary.

For rear axle differential replacement procedures, refer to Differential Replacement in Rear Drive Axle.