Soft Or Slipping 3-4 Upshift In "D" Position

Road test vehicle. See ROAD TEST in FORD F4E-III (MAZDA FA4A-EL) OVERHAUL article. Retrieve and record DTCs. See QUICK TEST  under DIAGNOSIS & TESTING. Perform TEST B  and TEST E  under SYSTEM TESTS. Repair as necessary. Clear codes and perform TRANSAXLE DRIVE CYCLE TEST  under DIAGNOSIS & TESTING. Repeat QUICK TEST  and ensure DTCs are not present.