NO 3RD, DIRECT CLUTCH DISTRESS SLIPS IN REVERSE /DISHED PLATE

********************************************************************** TRANSMISSION APPLICATIONS: SUBJECT: 1992 HYDRA-MATIC LOSS OF THIRD, DIRECT CLUTCH 4L80-E/4L80-EHD (MT1) DISTRESS, SLIPS IN REVERSE (NEW DISHED PLATE)

TRANSMISSION MODELS: VEHICLE APPLICATIONS: ALL C, K, P TRUCKS, G-VAN **********************************************************************

CONDITION:

SOME 1992 HYDRA-MATIC 4L80-E/4L80-EHD TRANSMISSIONS MAY EXPERIENCE LOSS OF THIRD, DIRECT CLUTCH DISTRESS AND/OR SLIPS IN REVERSE.

CAUSE:

THIS CAN BE CAUSED BY THE DIRECT CLUTCH DISHED PLATE DAMAGE OR CRACKING.

CORRECTION:

A NEW DIRECT CLUTCH DISHED PLATE (609) WAS RELEASED WITH A NEW MATERIAL THAT INCREASES THE DURABILITY.

DATE OF PRODUCTION: (FIGURE 1)

STARTING OCTOBER 1, 1991 (JULIAN DATE 274) ALL 1992 HYDRA-MATIC 4L80-E/4L80-EHD MODELS WERE BUILT WITH THE NEW DIRECT CLUTCH DISHED PLATE.

PARTS INFORMATION:

PART NUMBER NAME

8680816 PLATE--CLUTCH (.054 DISHED)

PARTS ARE CURRENTLY AVAILABLE AT GMSPO.

SERVICE MANUAL REFERENCE:

REFER TO YOUR APPROPRIATE SERVICE MANUAL FOR CORRECT REPLACEMENT PROCEDURES.

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER." THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS OCCURRING 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 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 1992, GM POWERTRAIN DIVISION. GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.