How to Use This Section

This section provides the following information:
- General diagnosis information on transmissions
- A detailed description of the Hydra-matic transmission operation
- Procedures for diagnosing the Hydra-matic transmission

When you diagnose any condition of the Hydra-matic transmission, begin with the FUNCTIONAL TEST PROCEDURE. This procedure indicates the proper path of diagnosing the transmission by describing the basic checks. This procedure will then refer you to the locations of specific checks. After you have determined the cause of a condition, refer to ON-VEHICLE SERVICE for repair procedures. If the faulty component is not serviceable without removing the transmission from the vehicle, refer to UNIT REPAIR for repair information.