Subaru 4-Speed – ATSG (Automatic Transmission Service Group)
Subaru 4-Speed – ATSG (Automatic Transmission Service Group) PDF. This booklet contains general description and the procedures necessary to repair, overhaul, or service the 1990-97 Subaru 4 speed electronic automatic overdrive transmission. The Subaru 4 speed is a fully automatic front or All wheel drive transmission. This unit is based on the Nissan RE4R01A platform. The shift pattern is controlled electronically with a Transmission Control Module. The TCM will vary shift points, as it is constantly interpreting numerous electronic signals from various operational sensors located on the vehicle.
The TCM also controls the apply and release of the Transfer Clutch which on All wheel Drive models controls the rear drive shaft output for 4 wheel drive.
- SERVICE INFORMATION
- VALVE BODY
- THEORY OF OPERATION
- TORQUE CONVERTER OPERATION
- EXPLODED VIEWS
- BEARING LOCATIONS
- PASSAGE IDENTIFICATION
- TRANSFER CLUTCH OPERATION AND DIAGNOSIS
- TROUBLE CODE RETRIEVAL