Differntial (Front) - Axle Leak Through Remote Vent
Number: 88-37Section: 4C
Date: August, 1987
SUBJECT: FRONT AXLE LUBRICANT LEAK THROUGH THE
REMOTE AXLE VENT
MODELS: 1988 K-1,2,3
On some 1988 K models, front axle lubricant entering the vent tube may be caught in any dips or traps in the tube and subsequently exit the remote vent at the end of the tube due to pressure differentials. The possibility of lubricant exiting the remote vent can be eliminated by removing any dips or traps in the tube using the following procedure.
FIGURE NO. 1:
Do not detach the hose from the axle but remove it from both of the routing/retaining clips. Remove routing clip from top of frame and discard. Install new routing clip, P/N 15567664, and secure with existing M 8 x 16 mm bolt (Figure No. 1).
FIGURE NO. 2:
FIGURE NO. 3:
For gasoline engine vehicles without auxiliary batteries (RPO TP2), remove the fuel canister and drill a 1/4" hole in the bracket on the inboard side about 1-1/2" down from the top of bracket (Figure No. 2). Insert new clip, P/N
8905794 and reinstall canister. Route the axle vent tube through these two new clips and raise the vent so no dips in vent tube exist and secure (Figure No. 3).
FIGURE NO. 4:
For diesel engine vehicles or vehicles with auxiliary batteries, a 1/4" hole must be drilled in the radiator support at a location 3/4" above and 1/2" inboard of the existing upper threaded hole. Install new clip, P/N 8905794. Route hose through clips and pull vent up so no dips exist and secure (Figure No. 4).
After completing the re-routing of the axle vent hose and relocation of the axle vent, any remaining axle lube should be cleaned up. The front axle lube level should be checked and brought up to full level with SAE 80W90 GL5 gear lubricant.
Time to accomplish this re-routing is .3 hrs.