TRANS. LEAK AT REAR EXTENSION HOUSING. Chevrolet Chevy G Van 1992

SUBJECT: TRANSMISSION LEAK AT REAR EXTENSION HOUSING AND PROP SHAFT (INSTALL NEW GREASE SLEEVE AND SEAL)

MODELS: 1991-95 CHEVROLET AND GMC TRUCK G VANS WITH 1991-94 HYDRA-MATIC 4L60 TRANSMISSION (RPO MD8) AND 1993-95 HYDRA-MATIC 4L60-E TRANSMISSION (RPO M30) "CBD AND CJD" BROADCAST CODES

CONDITION: (FIGURE 1)

SOME OWNERS OF THE LISTED VEHICLES WITH A ONE PIECE PROP SHAFT BUILT BEFORE OCTOBER 7, 1994 (JULIAN DATE 280) MAY COMMENT ABOUT A LEAK AT THE REAR EXTENSION HOUSING. THIS IS MOST NOTICEABLE WHEN THE VEHICLE IS PARKED FACING UP-HILL.

CAUSE:

THIS CONDITION IS DUE TO A LACK OF A GREASE SLEEVE ON THE OUTPUT SHAFT.

CORRECTION: (FIGURE 2)

ORDER AND INSTALL A NEW GREASE SLEEVE (690) AND SEAL ONTO THE OUTPUT SHAFT. THE PROP SHAFT SEAL (03764601) IS TO BE PRE-INSTALLED INTO THE INNER LIP OF THE SLEEVE (690). REFER TO YOUR SERVICE MANUAL FOR PROPER REPLACEMENT PROCEDURES.

SERVICE PARTS INFORMATION:

PART # DESCRIPT. ILL. # QTY.

8654063 SLEEVE-PROP SHAFT OIL SEAL 690 1 03764601 SEAL-PROP SHAFT OIL 691 1 *12345879 GREASE (PROP SHAFT YOKE SPLINES)

*THIS GREASE MUST BE APPLIED TO THE SLIP YOKE SPLINES BEFORE RE-ASSEMBLY.

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION: K6389 LABOR TIME: 0.5 HR.

FIGURES: 2 ATTACHMENTS: 0

Object Number: 84870 Size: FS

Object Number: 84869 Size: FS

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.