Time Lag Test
CAUTION:
Perform this test at normal operating fluid temperature of 122-176°F (50-80°C). Allow a one minute interval between tests. Make 3 measurements and take the average value.
- If shift lever is actuated with engine idling, a time lag will be noted before shock can be felt. This test is used for checking condition of Overdrive (OD) clutch, forward clutch, direct clutch and 1st reverse brake.
- Apply parking brake. Start engine. Ensure idle speed is 650 RPM in "N" range. Shift transmission from "N" into "D" range. Use a stop watch to measure elapsed time between shifting of lever until shock is felt.
- Time lag must be less than 0.7 seconds. Repeat procedure shifting from "N" to "R" range. Time lag must be less than 1.2 seconds.
- Excessive time lag for "N" to "D" range may be caused by low line pressure, defective forward clutch or defective Overdrive (OD) one-way clutch. Excessive time lag for "N" to "R" range may be caused by low line pressure, defective direct clutch, 1st and reverse brake or defective OD one-way clutch.