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 Repair Instructions for repair
procedures. If the faulty component is not serviceable without removing the
transmission from the vehicle, refer to Unit Repair for repair information.
Basic Knowledge
Notice: Do not, under any circumstances, attempt to diagnose a powertrain condition
without basic knowledge of this powertrain. If you perform diagnostic procedures
without this basic knowledge, you may incorrectly diagnose the condition
or damage the powertrain components.
You must be familiar with some basic electronics in order
to use this section of the service manual. You should also be able to use
the following special tools:
| • | A digital multimeter (DMM) |
| • | A line pressure gage set |
The Functional Test Procedures verify the correct operation of electronic
components in the transmission. These procedures eliminate the unnecessary
removal of transmission components.
