INFORMATION ON FOUR PLATE SECOND CLUTCH. Oldsmobile Aurora 1995

SUBJECT: INFORMATION ON FOUR PLATE SECOND CLUTCH

MODELS: 1995 OLDSMOBILE AURORA

TRANSAXLE APPLICATION: 1995 HYDRA-MATIC 4T80-E (RPO MH1)

SINCE THE START OF G-CAR PRODUCTION IN FEBRUARY, 1994 ALL 4T80-E TRANSAXLES, 5AKN AND 5ZYN, CONTAINED A 3-PLATE 2ND CLUTCH.

BECAUSE OF HEAT SPOTS ON FRICTION PLATES, STARTING JULY 22ND, 1994 (JULIAN DATE 202) ALL 4T80-E TRANSAXLES WILL HAVE A 4 PLATE 2ND CLUTCH. THESE G-CAR TRANSAXLES WILL BE IDENTIFIED WITH THE FOLLOWING ALPHA CODES: 5BBN AND 5BMN.

WHEN SERVICING A VEHICLE WITH A TRANSAXLE (5AKN OR A 5ZYN) AFTER JULIAN DATE 202, YOU MUST USE A NEW 5BBN OR 5BMN MODEL WITH A NEW MEM-CAL FOR THE PCM.

SERVICE PARTS INFORMATION:

GEAR PREVIOUS NEW PREVIOUS NEW RATIO MODEL MODEL MEM-CAL/CODE MEM-CAL/CODE

3.48 5AKN 5BMN 16208895/BMBR 16210105/BMRX 3.71 5ZYN 5BBN 16208901/BMBS 16210112/BMRY

PARTS ARE EXPECTED TO BE AVAILABLE ON SEPTEMBER 26, 1994.

REFER TO YOUR GOODWRENCH TRANSMISSION CATALOG FOR THE PROPER MODEL IDENTIFICATION.

FIGURES: 1 ATTACHMENTS: 0

Object Number: 84886 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 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.