Shift Schedules
As mentioned earlier, the TCM has programming that allows it to select a variety of shift schedules. Shift schedule selection is dependent on the following:
- Shift lever position
- Throttle position
- Engine load
- Fluid temperature
- Software level
As driving conditions change, the TCM appropriately adjusts the shift schedule. Refer to the following chart to determine the appropriate operation expected, depending on driving conditions.
| Schedule | Condition | Expected Operation |
|---|---|---|
| Extreme Cold | Oil temperature below -27°C (16°F) | -Park, Reverse, Neutral and 1st and 3rd gear only in D position, 2nd gear only in Manual 2 or L |
| -No EMCC | ||
| Super Cold | Oil temperature between -24°C (-12°F) and -12°C (10°F) | - Delayed 2-3 upshift |
| - Delayed 3-4 upshift | ||
| - Early 4-3 coastdown shift | ||
| - High speed 4-2, 3-2, 2-1 kickdown shifts are prevented | ||
| -Shifts at high throttle openings will be early. | ||
| - No EMCC | ||
| Cold | Oil temperature between -12°C (10°F) and 2°C (36°F) | -Shift schedule is the same as Super Cold except that the 2-3 upshifts are not delayed. |
| Warm | Oil temperature between 4°C (40°F) and 27°C (80°F) | - Normal operation (upshift, kickdowns, and coastdowns) |
| - No EMCC | ||
| - | Oil temperature between 27°C (80°F) and 115°C (240°F) | - Normal operation (upshift, kickdowns, and coastdowns) |
| Hot | - Normal EMCC operation | |
| Overheat | Oil temperature above 115°C (240°F) or engine coolant temperature above 118°C (244°F) | - Delayed 2-3 upshift |
| - Delayed 3-4 upshift | ||
| - 3rd gear FEMCC from 30-48 mph | ||
| - 3rd gear PEMCC above 35 mph | ||
| - Above 25 mph the torque converter will not unlock unless the throttle is closed or if a wide open throttle 2nd PEMCC to 1 kickdown is made |