TRANSMISSION FLUID LEAK (REPLACE TRANSMISSION)

SUBJECT: TRANSMISSION FLUID LEAK (REPLACE TRANSMISSION)

MODELS: 1996 C/K, M/L, S/T AND G MODELS WITH HYDRA-MATIC 4L60-E TRANSMISSION (RPO M30) AND 4.3L ENGINE (VINS W, X - RPOS L35 AND LF6)

CONDITION: (FIGURE 1)

SOME OWNERS WITH VEHICLES BUILT BEFORE AUGUST 26, 1995 (JULIAN DATE 238) AND A HYDRA-MATIC 4L60E TRANSMISSION WITH A TWO-PIECE CASE, MAY EXPERIENCE A FLUID LEAK IN THE REAR OF THE TRANSMISSION.

CAUSE: (FIGURE 2)

POROSITY IN THE REAR CASE AREA.

CORRECTION:

THE TRANSMISSION FLUID MUST BE AT OPERATING TEMPERATURE. VERIFY THE LEAK BY USING TRANSMISSION FLUID DIE (J28431-22) AND BLACK LIGHT (J28428-E). IF THE LEAK IS IN THE AREA SHOWN IN FIGURE 2, REPLACE THE TRANSMISSION WITH A GM GOODWRENCH TRANSMISSION.

SERVICE PARTS INFORMATION

REFER TO YOUR CURRENT SERVICE PARTS CATALOG FOR PROPER APPLICATIONS.

WARRANTY INFORMATION

FOR VEHICLES REPAIRED UNDER WARRANTY, USE: LABOR CODE: K7000 USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 2

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.

COPYRIGHT 1995 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.