Shift Speed Test

Use the following road test procedure to verify shift control valves are operating correctly:

1. Drive vehicle to bring engine and transaxle to operating temperature. Operate vehicle with gear selector in "OD" position.
2. Apply MINIMUM throttle and observe and record upshift speeds. Observe and record speed at which converter clutch applies. See SHIFT SPEED SPECIFICATIONS  table.
   SHIFT SPEED SPECIFICATIONS
   
   

   Throttle Position & Gear Shift		MPH Range
   Minimum Throttle
   1-2		8-10
   2-3		15-16
   3-4		32-34
   Closed Throttle
   4-3		30-33
   3-2		11-14
   2-1		7-10
   Wide Open Throttle
   1-2		30-41
   2-3		63-74
   3-4		95-98
   4-3		85-94
   3-2		59-70
   2-1		27-31

3. Stop vehicle and move gear selector to "D" position. Repeat step 2)  . Transaxle should make all upshifts except 3rd-to-4th. Torque converter lock-up should occur above 28.6 MPH.
4. Depress throttle pedal to Wide Open Throttle (WOT) position. Converter clutch should release and transaxle should perform 3-2 or 3-1 downshift depending on vehicle speed.
5. With vehicle speed greater than 30 MPH, move gear selector from "D" to "1" position and release accelerator pedal. Transaxle should immediately downshift to 2nd gear. When vehicle speed drops to less than 15 MPH, transaxle should downshift into 1st gear.
6. If transaxle fails to shift as described above, perform QUICK TEST procedure. See DIAGNOSIS & TESTING in FORD AX4N ELECTRONIC CONTROLS article.