Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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 |
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.