Operation CHARM: Car repair manuals for everyone.

Functional Check Procedure

1. Install a tachometer.
2. Operate the vehicle until proper operating temperature is reached.
3. Drive vehicle at 50-55 mph (80-88 km/h) with light throttle (road load).
4. Maintaining throttle lightly touch the brake pedal and check for a slight bump when the TCC releases and a slight increase in engine rpm.
5. Release the brake, slowly accelerate and check for a re-apply of the converter clutch and a slight decrease in engine rpm.