No 4-3 Or 2-1 Downshift

Perform ROAD TEST under PERFORMANCE TESTS in FORD 4R100 OVERHAUL article. Perform QUICK TEST . Record DTCs. Perform TEST A  under SYSTEM TESTS. Repair as necessary. Clear DTCs and perform TRANSMISSION DRIVE CYCLE TEST  under DIAGNOSIS & TESTING. Repeat QUICK TEST  and ensure DTCs are not present.