Governor: Testing and Inspection
1. PREPARATIONa. Warm up the transmission fluid.
b. Chock the rear wheels.
c. Jack up the vehicle and support it on stands.
d. Remove the transmission case test plugs and mount hydraulic pressure gauges.
SST 09992-00094 Oil pressure gauge
CAUTION:
a. Perform this test at normal operating fluid temperature (50 - 80 °C or 122 - 176 °F).
b. Measurement can be made with 800 or 1,000 rpm test, but if tests are to be made at 1,600 or 1,800 and 2,400 or 3,500 rpm, it would be safer to test on a road or chassis dynamometer because an on stand test could be hazardous.
2. MEASURE GOVERNOR PRESSURE
a. Check that parking brake is applied.
b. Start the engine.
c. Shift into D range and measure the governor pressure at the speeds specified in the table.
EVALUATION
If governor pressure is defective:
- Line pressure defective
- Fluid leakage in governor pressure circuit
- Governor valve operation defective