Road Test: Notes

If transmission shift speeds are not as specified during road test, check for DTCs. See HYDRA-MATIC 4L60-E ELECTRONIC CONTROLS article. If slippage occurs, determine which components are applied in each gear to aid in diagnosis. See CLUTCH & BAND APPLICATIONS under TROUBLE SHOOTING. Perform hydraulic pressure test to check transmission internal components. See HYDRAULIC PRESSURE TESTS .

NOTE: Perform the following tests in the sequence given. Ensure engine is operating properly, and transmission fluid level and tire pressure are correct.