K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
(Figure 1) Starting January 17, 1990 (Julian Date 017), all 9CMY and 9KNY HM-117 transmissions were built with this new Vent Pipe (296).
SERVICE PROCEDURE:
(Figures 2 & 3)
1.
Remove transmission (also transfer case if applicable).
2.
Remove existing vent pipe (296).
3.
Install a new vent pipe (296).
*
Lightly coat the ribbed end of the vent pipe with Loctite 609.
NOTICE:
If excess locate is used or if it is applied to the vent pipe hole rather than on the vent pipe ribbed end, the loctite may drip inside the
transmission and onto the reverse shift rail. If this occurs, the transmission will not shift into reverse after the locite cures.
-
End of fitting towards clutch housing.
-
Install with Tool J 38754.
4.
Attach the rubber vent hose to the vent pipe and secure it with the worm clamp.
5.
Reinstall the transmission (also transfer case if applicable).
SERVICE PARTS INFORMATION:
This part is currently available from GMSPO.
SERVICE NOTES:
Whenever an HM-117 transmission is serviced, use only transmission fluid GM Part No. 12345577 Lubricant (23 oz. container).
SERVICE MANUAL REFERENCE:
Refer to transmission replacement in the on-vehicle service section of the appropriate service manual for procedures.
WARRANTY INFORMATION
For vehicles repaired under warranty use:
