Propane Sulfur Or Foul Odor From The Rear Axle - keywords differential fluid vent

This PI was superseded to update model years. Please discard PIP4027.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Odor or repeat odor from the rear axle with no other noise symptoms.

1. Drain and disassemble the rear axle by removing the gear case and axle shafts.
2. Clean the rear axle and gear case completely with a suitable solvent make sure the housing is clean and dry prior to reassembly.
3. Replace the rear axle vent hose and cap.
4. Relocate the vent to either near the spare tire or evap canister area.
5. Cut the new vent hose approximately 6 inches from the vent cap end and install filter part number 5651682, secure the filter with clamps supplied.
6. Fill the axle with the appropriate fluid listed in SI.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.