Line Pressure Test

CAUTION: Perform the line pressure test prior to performing the stall speed test. If line pressure is low at stall, do not perform the stall speed test or further transmission damage will occur. Do not maintain wide-open throttle in any gear range for more than 5 seconds.

This test verifies the line pressure is within specifications.





1. Connect the pressure gauge to the line pressure tap.

Pressure Chart 401:

2. Start the engine and check the line pressures. Refer to Pressure Chart No. 401 to determine if the line pressure is within specification.





3. If the line pressure is not within specifications, perform On-Board Diagnostics and Pinpoint Test E, air pressure check, and clean, inspect and replace the main control system or pump as required.