NEW INPUT INNER SEAL 440-T4 SHORTLIP & 3RD CLUTCH DESIGN

TRANSMISSION APPLICATIONS: SUBJECT: 4T60 OR F-7 NEW INPUT INNER SEAL (SHORT LIP DESIGN AND 3RD CLUTCH INNER PISTON SEAL

TRANSMISSION MODELS: VEHICLE APPLICATIONS: 1984-91 A,C,E,H,K,W,V CAR Bulletin Covers: (Figure 1)

New input and 3rd clutch inner piston seals for a vehicle equipped with a 1990-91 HYDRA-MATIC 4T60 and THM F-7 transaxles. The new seals are both made from VAMAC (R) material. The 3rd clutch inner piston seal is identical to the previous but does not have the hash marks. The new input inner piston seal is a short lip design.

DATE OF PRODUCTION CHANGE:

Beginning December 18, 1989 (Julian Date 352), all 1990-91 HYDRA-MATIC 4T60 and THM F-7 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.

SERVICE MANUAL REFERENCE:

Refer to the appropriate 1984 through 1991 Service Manuals for proper disassembly and assembly procedures.

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