For 1990-2009 cars

# BORG-WARNER T5 5-SPEED MANUAL TRANSMISSION JUMPS OUT OF GEAR

#### SUBJECT: BORG-WARNER T5 5-SPEED MANUAL TRANSMISSION JUMPS OUT OF GEAR IN REVERSE (REPLACE TRANSMISSION ASSEMBLY)

#### MODELS: 1993-95 CHEVROLET CAMARO 1993-95 PONTIAC FIREBIRD WITH T5 5-SPEED MANUAL TRANSMISSION (RPO M49)

#### CONDITION:

YOU MAY RECEIVE COMMENTS CONCERNING A "JUMP OUT OF GEAR" CONDITION FOR THE REVERSE GEAR IN A BORG-WARNER T5 5-SPEED MANUAL TRANSMISSION.

#### CAUSE:

INSUFFICIENT LOAD AT THE REVERSE LINKAGE MAY PERMIT TRANSMISSION TO DISENGAGE FROM REVERSE.

#### CORRECTION:

VERIFY THAT OTHER CONDITIONS SUCH AS SHIFTER BOOT MISLOCATION IS NOT THE CAUSE OF THE "JUMP OUT OF GEAR" CONDITION (REFERENCE BULLETIN 477202).

A REVISED OVER-CENTER SPRING MECHANISM HAS BEEN INCORPORATED IN THE REVERSE LINKAGE TO ADDRESS THE CUSTOMER CONCERN. THE 1996 MODEL YEAR BORG-WARNER T5 INCORPORATES THESE REVISED COMPONENTS ALREADY.

THIS REVISED SYSTEM CONSISTS OF AN OVER-CENTER SPRING, SPRING PIN, AND TRANSMISSION CASE. REFER TO THE 1996 TRANSMISSION UNIT REPAIR MANUAL FOR THE LOCATION OF THESE REVISED COMPONENTS.

IN ADDITION, DEPENDING ON THE FREQUENCY OF THE REVERSE "JUMP OUT OF GEAR" CONDITION, IT IS RECOMMENDED THAT THE MAINSHAFT, COUNTER SHAFT, REVERSE SHIFT FORK, REVERSE IDLER GEAR, 5TH / REVERSE SHIFT LEVER, AND ANY APPLICABLE BEARINGS AND SEALS BE INSPECTED FOR DAMAGE AND REPLACE PER APPLICABLE SERVICE MANUAL PROCEDURES.

FOR EASE OF REPAIR AND CUSTOMER SATISFACTION, A COMPLETE REVISED T5 ASSEMBLY (PART NO. 12533893) IS AVAILABLE TO ADDRESS THE REVERSE "JUMP OUT OF GEAR" CONDITION. THIS ASSEMBLY INCORPORATES THE REVISED COMPONENTS SHOWN ABOVE. THE REVISED T5 TRANSMISSION ASSEMBLY IDENTIFICATION TAG WILL READ "1352-259". THE PREVIOUS MODEL TRANSMISSION WAS A "1352-245".

#### IMPORTANT: FOR 1993 AND 1994 MODEL VEHICLES, INSTALL A REVISED VEHICLE SPEED SENSOR (VSS) DRIVEN GEAR (PART NO. 12550928) IN ADDITION TO THE REVISED TRANSMISSION ASSEMBLY. THE CURRENT 1993 AND 1994 VSS DRIVEN GEAR **WILL NOT** MATE WITH THE REVISED TRANSMISSION ASSEMBLY.

#### IMPORTANT: ALL FUTURE REPAIRS OF THE REVISED ASSEMBLY SHOULD BE PERFORMED USING INDIVIDUAL COMPONENTS AVAILABLE FROM GMSPO. REFERENCE THE APPROPRIATE PARTS CATALOG FOR THE APPLICABLE PART NUMBERS.

PARTS INFORMATION

PART NO. DESCRIPTION QTY

12533893 TRANS ASSY 1

12550928 (A) GEAR, VSS DRIVEN 1

(A) 1993 AND 1994 MODEL VEHICLES ONLY

PARTS ARE EXPECTED TO BE AVAILABLE ON SEPTEMBER 16, 1996 FROM GMSPO.

WARRANTY INFORMATION FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

USE LABOR OPERATION: K2720, R + R TRANS ASSY. USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 0 ATTACHMENTS: 0

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.