Jeep Cherokee

 Service Manual

Transmission and transfer case » AW-4 automatic transmission » Diagnosis and testing
Time lag test

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.

General diagnosis information

Effects of incorrect fluid level

Causes of burnt fluid

Fluid contamination

Preliminary inspection and adjustment

Manual shifting test

Hydraulic pressure test

Pressure test analysis

Time lag test

Test procedure

Time lag test analysis

Service diagnosis

Transmission solenoid testing

Park/neutral position switch

Gearshift cable

Throttle valve cable

Speed sensor testing

Flow testing transmission main cooler

Torque converter stator clutch inspection