Hydraulic Test

1. MEASURE LINE PRESSURE

a. Warm up the transmission fluid.
b. Remove the transmission case test plug and mount the oil pressure gauge (SST).
SST 09922-00094

CAUTION: Perform the test at normal operating fluid temperature (122 - 176 °F or 50 - 80 °C).

c. Fully apply the parking brake and chock the tour wheels.
d. Start the engine and check the idle speed.
e. Shift into the D range, step down strongly on the brake pedal with your left foot and while manipulating the accelerator pedal with the right foot, measure the line pressure at the engine speeds specified in the table.




f. In the same manner, perform the test in the R range.
g. If the measured pressures are not up to specified values, recheck the throttle cable adjustment and retest.

EVALUATION
a. If the measured values at all ranges are higher than specified:
- Throttle cable out of adjustment
- Throttle valve defective
- Regulator valve defective

b. If the measured values at all ranges are lower than specified:
- Throttle cable out of adjustment
- Throttle valve defective
- Regulator valve defective
- Oil pump defective

c. If pressure is low in the D range only:
- D range circuit fluid leakage
- Forward clutch defective

d. If pressure is low in the R range only:
- R range circuit fluid leakage
- First and reverse brake defective
- Direct clutch defective




2. MEASURE GOVERNOR PRESSURE
a. Warm up the transmission fluid.
b. Remove the transmission case test plug and mount the oil pressure gauge (SST).
SST 09992-00094

CAUTION: Perform the test at normal operating fluid temperature (122 - 176 °F or 50 - 80 °C).

c. Check the parking brake to see that it is not applied.
d. Start the engine.
e. Shift into the D range and measure the governor pressures 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