Shift Speed Road Test
- 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 SHIFT SPEEDS (1997 B2300)
or 4R44E SHIFT SPEEDS (1998 B2300 & B3000)
table.
- Stop vehicle. Press TCS switch, O/D OFF light will illuminate. Repeat step 1
. Transmission will make all upshifts except 3-4. Torque converter lockup should occur above 27 MPH (46 km/h).
- Press accelerator pedal to floor (WOT). Transmission should downshift from 3rd-to-2nd or 3rd-to-1st gear depending on vehicle speed. Torque converter clutch should unlock.
- When traveling at approximately 30 MPH (48 km/h) in "D" position and transmission is manually shifted into 1st gear, transmission should shift into 2nd gear. When speed drops below 20 MPH (32 km/h), transmission will downshift into 1st gear.
- If transmission fails to upshift/downshift or torque converter clutch does not lock/unlock, see TROUBLE SHOOTING
.
4R44E SHIFT SPEEDS (1997 B2300)
| Operating Condition |
Shift Speed MPH |
| 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 SHIFT SPEEDS (1998 B2300 & B3000)
| Operating Condition |
Shift Speed MPH |
| Minimum Throttle |
| 1-2 |
14-23 |
| 2-3 |
18-35 |
| 3-4 |
38-60 |
| 4-3 |
29-43 |
| 3-2 |
16-19 |
| 2-1 |
13-19 |
| Partial Throttle |
| 1-2 |
22-39 |
| 2-3 |
36-60 |
| 3-4 |
55-90 |
| 4-3 |
38-66 |
| 3-2 |
17-44 |
| 2-1 |
11-13 |
| WOT |
| 1-2 |
34-48 |
| 2-3 |
57-82 |
| 3-4 |
52-77 |
| 4-3 |
91-108 |
| 3-2 |
78-86 |
| 3-1 & 2-1 |
24-42 |
| Coast |
| 3-2 |
17-19 |
| 2-1 |
11-13 |
| Manual 2-1 |
35-42 |