Regal V6-191 3.1L (1991)
DATE OF PRODUCTION CHANGE: (Figure 1)
The controlled compression bottom pan gasket went into production on June 24, 1991 (Julian Date 175) for all Hydra-Matic 4T60 transaxles.
SERVICE PROCEDURE:
This new controlled compression bottom pan gasket can be used on all previous Hydra-Matic 4T60 transaxles when used with the new 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 affect 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 currently available from GMSPO.