Chevette L4-98 1.6L (1982)
This new Viton seal can be used on all model year HYDRA-MATIC 3T40 (THM 125C) transaxles.
Refer to the following part number when ordering new Viton seals to service the Forward clutch assembly.
Part Number
Description
8631986
Piston Seals (Viton), Forward Clutch
Current packages will be revised to contain new Viton seals. Parts are currently available from GMSPO.
Refer to the HYDRA-MATIC 3T40 (THM 125C) (MD9) Automatic Transaxle Unit repair section of your service manual whenever service of the
Forward Clutch is necessary.
