A/T - New Input and 3RD Clutch Inner Piston Seal
90oldsmobile12SUBJECT NEW INPUT INNER PISTON SEAL (SHORT LIP
DESIGN) AND 3RD CLUTCH INNER PISTON SEAL
MODELS/YEARS 1984-1991 MODELS EQUIPPED WITH HYDRA-MATIC 4T60 TRANSAXLES (RPO-ME9)
NUMBER: 91-T-03
CORP.REF.NO: 077124
DATE: August 1990
SECTION: 4T60
Previous And New Input/3rd Inner Piston Seal:
BULLETIN COVERS:
New input and 3rd clutch inner piston seals for a vehicle equipped with a 1990-91 HYDRA-MATIC 4T60 transaxle. The new seals are both made from VAMAC(R) material. The new 3rd clutch inner piston seal is identical to the previous seal but does not have the hash marks. The new input inner piston seal is a short lip design. See the illustration on the back of this bulletin.
DATE OF PRODUCTION CHANGE:
Beginning December 18, 1989 (Julian Date 352), all 1990-91 HYDRA-MATIC 4T60 transaxles have been built using the short lip design for the input inner piston seal and VAMAC(R) material for the input/3rd inner piston seals.
SERVICE PARTS INFORMATION:
Short lip seals and the VAMAC(R) material seals are interchangeable with the current seals. These new seals will service all 1984 through 1991 models. The new design will replace the current seal in service packages as stock is depleted.
We believe this source and their product to be reliable. There may be additional manufacturers of such products. General Motors does not endorse, indicate any preference for or assume any responsibility for the products or equipment from these firms or for any such items which may be available from other sources.
SERVICE MANUAL REFERENCE:
Refer to the appropriate 1984 through 1991 Service Manuals for proper disassembly and assembly procedures.