Road Test
This test will determine if shift control system is functioning properly.
- Ensure engine and transmission is at normal operating temperature. Road test vehicle in "D" (overdrive on). Apply minimum throttle and observe speeds at which upshift occurs and torque converter engages. See 4R44E/4R55E SHIFT SPEEDS (2.3L 2WD)
, 4R44E/4R55E SHIFT SPEEDS (3.0L 2WD)
, 4R44E/4R55E SHIFT SPEEDS (3.0L 4WD)
, 4R44E/4R55E SHIFT SPEEDS (4.0L 2WD)
or 4R44E/4R55E SHIFT SPEEDS (4.0L 4WD)
table.
- Stop vehicle. Press TCS switch, O/D OFF light will illuminate. repeat previous step. Transmission will make all upshifts except 3-4. Torque convertor lockup should occur above 27 MPH.
- Press accelerator pedal to floor (WOT). Transmission should downshift from 3rd to 2nd or 3rd to 1st gear depending on vehicle speed. Torque convertor clutch should unlock.
- When traveling at approximately 30 MPH in "D" and transmission is manually shifted into 1st gear, transmission should shift into 2nd gear. When speed drops below 20 MPH, transmission will downshift into 1st gear.
- If transmission fails to upshift/downshift or torque convertor clutch does not lock/unlock, see TROUBLE SHOOTING
.
4R44E/4R55E SHIFT SPEEDS (2.3L 2WD)
| Operating Condition |
Shift Speed MPH (3.73 Axle Ratio) |
| Minimum Throttle |
| 1-2 |
11-17 |
| 2-3 |
20-27 |
| 3-4 |
44-51 |
| Partial Throttle |
| 1-2 |
23-29 |
| 2-3 |
37-44 |
| 3-4 |
60-67 |
| 4-3 |
43-49 |
| 3-2 |
25-31 |
| WOT |
| 1-2 |
37-43 |
| 2-3 |
66-74 |
| 3-2 |
61-69 |
| 3-1/2-1 |
31-39 |
| Coast |
| 3-2 |
13-20 |
| 2-1 |
6-11 |
| Manual 2-1 |
30-35 |
4R44E/4R55E SHIFT SPEEDS (3.0L 2WD)
| Operating Condition |
Shift Speed MPH (3.45 Axle Ratio) |
Shift Speed MPH (3.73 Axle Ratio) |
| Minimum Throttle |
| 1-2 |
11-17 |
10-16 |
| 2-3 |
20-25 |
18-25 |
| 3-4 |
45-52 |
42-49 |
| Partial Throttle |
| 1-2 |
22-28 |
20-26 |
| 2-3 |
35-42 |
33-40 |
| 3-4 |
64-71 |
58-67 |
| 4-3 |
54-61 |
50-57 |
| 3-2 |
32-38 |
30-36 |
| WOT |
| 1-2 |
37-44 |
35-41 |
| 2-3 |
69-78 |
64-71 |
| 3-2 |
66-74 |
61-69 |
| 3-1/2-1 |
34-39 |
31-38 |
| Coast |
| 3-2 |
15-20 |
13-20 |
| 2-1 |
9-14 |
9-14 |
| Manual 2-1 |
33-38 |
33-38 |
4R44E/4R55E SHIFT SPEEDS (3.0L 4WD)
| Operating Condition |
Shift Speed MPH (3.73 Axle Ratio) |
Shift Speed MPH (4.10 Axle Ratio) |
| Minimum Throttle |
| 1-2 |
12-17 |
10-16 |
| 2-3 |
20-26 |
18-25 |
| 3-4 |
45-53 |
41-49 |
| Partial Throttle |
| 1-2 |
22-29 |
20-26 |
| 2-3 |
36-43 |
33-40 |
| 3-4 |
64-72 |
58-67 |
| 4-3 |
54-62 |
49-57 |
| 3-2 |
30-37 |
28-34 |
| WOT |
| 1-2 |
38-45 |
34-41 |
| 2-3 |
71-79 |
64-73 |
| 3-2 |
66-74 |
60-69 |
| 3-1/2-1 |
34-41 |
31-38 |
| Coast |
| 3-2 |
14-19 |
13-19 |
| 2-1 |
9-14 |
8-14 |
| Manual 2-1 |
25-30 |
25-30 |
4R44E/4R55E SHIFT SPEEDS (4.0L 2WD)
| Operating Condition |
Shift Speed MPH (3.08 Axle Ratio) |
Shift Speed MPH (3.55 Axle Ratio) |
| Minimum Throttle |
| 1-2 |
14-20 |
12-18 |
| 2-3 |
23-30 |
20-27 |
| 3-4 |
46-53 |
39-46 |
| Partial Throttle |
| 1-2 |
25-32 |
22-29 |
| 2-3 |
40-47 |
35-41 |
| 3-4 |
58-66 |
50-58 |
| 4-3 |
53-61 |
46-53 |
| 3-2 |
33-40 |
28-33 |
| WOT |
| 1-2 |
39-46 |
34-39 |
| 2-3 |
70-79 |
61-69 |
| 3-2 |
65-73 |
56-64 |
| 3-1/2-1 |
34-40 |
29-36 |
| Coast |
| 3-2 |
12-22 |
9-15 |
| 2-1 |
10-16 |
14-20 |
| Manual 2-1 |
30-35 |
30-35 |
4R44E/4R55E SHIFT SPEEDS (4.0L 4WD)
| Operating Condition |
Shift Speed MPH (3.27 Axle Ratio) |
Shift Speed MPH (3.73 Axle Ratio) |
| Minimum Throttle |
| 1-2 |
15-20 |
12-19 |
| 2-3 |
19-30 |
20-28 |
| 3-4 |
48-55 |
42-49 |
| Partial Throttle |
| 1-2 |
27-33 |
24-30 |
| 2-3 |
42-49 |
37-44 |
| 3-4 |
61-69 |
54-62 |
| 4-3 |
54-62 |
47-55 |
| 3-2 |
35-42 |
30-37 |
| WOT |
| 1-2 |
41-48 |
36-43 |
| 2-3 |
74-82 |
64-73 |
| 3-2 |
68-77 |
59-68 |
| 3-1/2-1 |
35-42 |
30-38 |
| Coast |
| 3-2 |
17-23 |
15-21 |
| 2-1 |
11-17 |
10-15 |
| Manual 2-1 |
30-35 |
30-35 |