Time Lag Test

NOTE: This test checks general condition of the overdrive clutch, forward clutch, rear clutch and first/reverse brake. Condition is indicated by the amount of time required for clutch/brake engagement with the engine at curb idle speed. Engagement time is measured for D and Reverse positions. A stop watch is recommended for test accuracy.

TIME LAG TEST PROCEDURE
1. Check and adjust transmission fluid level if necessary.

2. Bring transmission to normal (hot) operating temperature.

3. Apply parking brakes and turn off A/C unit.

4. On 4WD models, shift transfer case into two-wheel high.

5. Start engine and check curb idle speed. Adjust speed if necessary. Curb idle must be correct to ensure accurate test results.

6. Shift transmission into Neutral and set stop watch.

7. During following test steps, start stop watch as soon as shift lever reaches D and Reverse detents.

8. Shift transmission into D range and record time it takes for engagement. Repeat test two more times.

9. Reset stop watch and shift transmission back to Neutral.

10. Shift transmission into Reverse and record time it takes for engagement. Repeat test two more times.

11. Engagement time in D range should be a maximum of 1.2 seconds. Engagement time for Reverse should be a maximum of 1.5 seconds.

TIME LAG TEST ANALYSIS
If engagement time is longer than specified for D range, check for the following:

- shift linkage misadjusted

- line pressure low

- forward clutch worn

- overdrive clutch worn or damaged

If engagement time is longer than specified for Reverse, check for the following:

- shift linkage misadjusted

- line pressure low

- direct clutch worn

- first/reverse brake worn

- overdrive clutch worn or damaged