TCC RELEASE SWITCH CIRCUIT MALFUNCTION / DTC P1887

SUBJECT: TCC RELEASE SWITCH CIRCUIT MALFUNCTION/DTC P1887 (FOLLOW THE PROCEDURE FOR DTC P1887)

MODELS: 1996 CHEVROLET CAVALIER 1996 PONTIAC SUNFIRE 1996 TOYOTA CAVALIER WITH 2.2L OR 2.4L ENGINE (VINS 4, T - RPOS LN2, LD9) AND HYDRA-MATIC 4T40-E TRANSAXLE (RPO MN4)

CONDITION: (FIGURE 1) SOME OWNERS OF VEHICLES WITH A HYDRA-MATIC 4T40-E TRANSAXLE BUILT PRIOR TO JUNE 17, 1996 (JULIAN DATE 169) MAY EXPERIENCE AN MIL LIGHT ON WITH NO NOTICEABLE CHANGE IN VEHICLE PERFORMANCE DUE TO A DTC P1887 BEING SET.

CAUSE: (FIGURE 2) A MAJORITY OF CAUSES FOR THE ABOVE CODE HAVE BEEN DUE TO A DELAMINATION OR TEAR OF THE SEAL WITHIN THE OIL PUMP BEARING AND SEAL ASSEMBLY (200).

CORRECTION:

FOLLOW THE PROCEDURE FOR DTC P1887 WITHIN THE DIAGNOSIS SECTION OF THE SERVICE MANUAL. (REFER TO UPDATED PROCEDURE LISTED IN CORPORATE BULLETIN NUMBER 67-71-41.) IF THIS PROCEDURE LEADS YOU TO A TRANSAXLE PROBLEM (STEP 14), CONTINUE WITH THE FOLLOWING REMOVAL AND REPLACEMENT PROCEDURE.

REMOVAL AND REPLACEMENT PROCEDURE 1) REMOVE THE TRANSAXLE FROM THE VEHICLE.

2) REMOVE THE PUMP ASSEMBLY FROM THE VALVE BODY ASSEMBLY. (REFER TO THE UNIT REPAIR MANUAL FOR PROPER PROCEDURE.)

3) INSPECT THE OIL PUMP BEARING AND SEAL ASSEMBLY (200) FOR DELAMINATION OR TEARING OF THE SEAL. (FIGURE 2)

4) IF THE ABOVE CONDITION EXISTS, REPLACE THE OIL PUMP ASSEMBLY.

IMPORTANT: THE OIL PUMP BEARING AND SEAL ASSEMBLY IS NOT SERVICED SEPARATELY AND IS ONLY AVAILABLE WITH THE OIL PUMP ASSEMBLY.

PARTS INFORMATION

NEW PART NUMBER DESCRIPTION 24208987 A/TRANS OIL PUMP ASM.

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR CODE: K7121 LABOR TIME: USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 2 ATTACHMENTS: 0

FIGURE 1. - HYDRA-MATIC 4T40-E TRANSAXLE IDENTIFICATION INFORMATION FIGURE 2. - OIL PUMP BEARING LOCATION

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 1996. GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.