A/T - Four Plate Second Clutch

File In Section: 7 - Transmission

Bulletin No.: 47-71-34

Date: October, 1994

Subject:
Four Plate Second Clutch

Model:
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.





Parts Information

Parts are currently available from GMSPO.

Refer to your Goodwrench Transmission catalog for the proper model identification.