Hydraulic Pressure Test: Notes
NOTE:
A 300 psi (21 kg/cm2
) pressure gauge must be used to perform hydraulic pressure test.
- Ensure fluid level and condition are okay. Install tachometer. Apply parking brake and block the wheels. Using Adapter (7554), connect pressure gauge to test port on side of transmission case. See Fig 1 .
- Start engine and ensure engine idle speed is within specification. Refer to emission decal in engine compartment. Apply service brake. Allow engine to idle until transmission is at normal operating temperature.
- Shift transmission into "D" (Drive) and note line pressure with engine idling. Line pressure should be 61-70 psi (4.3-4.9 kg/cm2 ).
- Fully depress throttle to wide open throttle and note line pressure with transmission in "D" (Drive) . Line pressure should be 173-209 psi (12.2-14.7 kg/cm2
).CAUTION: DO NOT maintain full throttle for more than 4 seconds.
- Shift transmission into Reverse and note line pressure with engine idling. Line pressure should be 75-90 psi (5.3-6.3 kg/cm2 ).
- Fully depress throttle to wide open throttle and note line pressure with transmission in Reverse. Line pressure should be 213-263 psi (14.9-18.5 kg/cm2
).CAUTION: DO NOT maintain full throttle for more than 4 seconds.
- If line pressure is not within specification, adjust throttle cable and repeat hydraulic pressure test. See appropriate TRANSMISSION SERVICING - A/T article in TRANSMISSION SERVICING.
NOTE:
Use the following symptoms for trouble shooting results of hydraulic pressure test.