Road Test
NOTE:
Use the following road test procedure to verify shift control valves are operating correctly:
- Drive vehicle to bring engine and transaxle to operating temperature. Operate vehicle with gear selector in "OD" position.
- Apply MINIMUM throttle and observe and record upshift speeds. See VEHICLE SHIFT SPEEDS . Observe and record speed at which converter clutch applies.
- 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 27 MPH (43 km/h).
- Depress throttle pedal to Wide Open Throttle (WOT) position. Converter clutch should release and transaxle should downshift to next lower gear.
- With vehicle speed greater than 30 MPH (48 km/h), 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 20 MPH (32 km/h), transaxle should downshift into 1st gear.
- If transaxle fails to shift as described above, see AUTO TRANS DIAGNOSIS - AX4S ELECTRONIC article.
NOTE:
Shift speeds are approximate.
VEHICLE SHIFT SPEEDS
| Operating Condition |
Shift Speed MPH |
| Minimum Throttle |
| 1-2 |
7-9 |
| 2-3 |
12-17 |
| 3-4 |
34-41 |
| Partial Throttle |
| 1-2 |
7-39 |
| 2-3 |
12-66 |
| 3-4 |
34-96 |
| 4-3 |
25-83 |
| 3-2 |
11-60 |
| 2-1 |
5-11 |
| WOT |
| 1-2 |
31-41 |
| 2-3 |
66-71 |
| 3-4 |
95-100 |
| 4-3 |
85-91 |
| 3-2 |
60-62 |
| 2-1 |
25-29 |
| Coast |
| 4-3 |
20-30 |
| 3-2 |
5-15 |
| 2-1 |
4-6 |