No 4-3, 3-2 Or 2-1 Downshift In "D" Position

Road test vehicle. See ROAD TEST  under PERFORMANCE TESTS. Retrieve and record DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES (QUICK TEST)  under SELF-DIAGNOSTIC SYSTEM. Perform TEST A: SHIFT & TCC SOLENOIDS  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.