Poor Vehicle Performance

Check for poor engine performance. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. Road test vehicle. See ROAD TEST  under PERFORMANCE TESTS. Check torque converter clutch operation. See TORQUE CONVERTOR ENGAGEMENT TEST  under SELF-DIAGNOSTIC SYSTEM. Retrieve and record DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM. Perform TEST A: SHIFT & TCC SOLENOIDS  , TEST B: TFT SENSOR  and TEST C: DIGITAL TRANSMISSION RANGE SENSOR  under DIAGNOSTIC TESTS. Repair as necessary. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  . Perform TRANSMISSION DRIVE CYCLE TEST  under SELF-DIAGNOSTIC SYSTEM. Repeat QUICK TEST. Ensure DTCs are not present.