A/T - New Bottom Pan & Controlled Compression Gasket

9210pontiac01

Bulletin Number: 92-7-6
Reference Number: 177129
Publish Date: 2/92


Subject: NEW BOTTOM PAN AND CONTROLLED COMPRESSION BOTTOM PAN GASKET (SERVICE INFORMATION)

Models
Affected: 1984-92 6000, BONNEVILLE AND
GRAND PRIX MODELS


TRANSAXLE APPLICATIONS: 1984-1992 HYDRA-MATIC 4T60 (RPO ME9)

TRANSAXLE MODELS: All





A new transaxle Bottom Pan having a flat face along the pan rail and Controlled Compression Bottom Pan Gasket has been released for all.


HYDRA-MATIC 4T60 transaxles. The new pan must be used with the new gasket. This bottom pan and gasket assembly was designed to reduce the potential of bottom pan leaks. The new gasket is black in color and has a rubber-like texture. The controlled compression gasket is designed to be a REUSABLE GASKET.





HYDRA-MATIC 4T60 Transaxle Identification Information


Date of Production Change:

The controlled compression bottom pan gasket went into production on June 24, 1991 (Julian Date 175) for all HYDRA-MATIC 4T60.

Service Procedure:

This new controlled compression bottom pan gasket can be used on all previous HYDRA-MATIC 4T60 transaxles when used with the now bottom pan and flanged hex head bolt. The old style conical washer screw can be used with the new bottom pan and controlled compression gasket, but the new flanged hex head bolt CANNOT be used on the old style bottom pan and gasket combination.


Bottom Pan Gasket Replacement:

1. Clean sealing surface of the bottom pan and machined surface of the transaxle case. If gasket is being reused, inspect the surface for damage and replace if needed. All mating surfaces must be clean and free of transaxle fluid.

2. Carefully align the bottom pan bolt holes with the gasket and transaxle case mounting holes. Install all bolts by hand and torque to 17 N-m (151 lb. in.).

Note: If the controlled compression gasket is being reused, clean the surface with a soft cloth. Use of solvents may cause damage to the gasket and effect its durability.

Service Part Information:

Whenever ordering this new controlled compression gasket, refer to the following part numbers:

Service
Part Number Description (Pkg Contents) Models

8675995 Transaxle Bottom Pan Package All 4T60
(1) Pan, Transaxle Oil
(1) Gasket, Transaxle Oil Pan
(19) Bolt, Flanged Metric Hex Head
(1) Magnet, Chip Collector

8678681 Transaxle Bottom Pan Gasket, Controlled Compression

Parts are expected to be available on November 4, 1991. In case of limited inventory, parts will be placed on 400 control to waive VIP surchages. Only verifiable emergency VIP orders will be accepted. SPO will make every effort to obtain parts. However, the part will be shipped premium transportation at dealer's expense, and all other order types will be placed on backorder until the 400 control is removed.