Shift Schedules
As mentioned earlier, the TCM has programming that allows it to select a variety of shift schedules. Shift schedule selection is defendant on these factors.
- Shift lever position.
- Throttle position.
- Engine load.
- Fluid temperature.
- Software level.
NOTE:
The following table determines the appropriate operate expected, depending on driving conditions.
SHIFT SCHEDULES
| Schedule | Condition | Expected Operation |
|---|---|---|
| Extreme Cold | Oil Temperature At Start-Up Below -16° F. | Park, Reverse, Neutral & 2nd Gear Only (Prevents Shifting Which May Fail A Clutch With Frequent Shifts). |
| Cold | Oil Temperature At Start-Up Above -12° F & Below 36° F. | Delayed 2-3 Upshift (Approximately 22-31 MPH). Delayed 3-4 Upshift (Approximately 45-53 MPH). Early 4-3 Coastdown Shift (Approximately 30 MPH). Early 3-2 Coastdown Shift (Approximately 17 MPH). High Speed 4-2, 3-2, 2-1 Kickdown Shifts Are Prevented. No EMCC. |
| Warm | Oil Temperature At Start-Up Above 36° F & Below 80° F. | Normal Operation (Upshift, Kickdowns, & Coastdowns). No EMCC. |
| Hot | Oil Temperature At Start-Up Above 80° F. | Normal Operation (Upshift, Kickdowns, & Coastdowns). Full EMCC, No PEMCC Except To Engage FEMCC (Except At Closed Throttle At Speeds Above 70-83 Mph). |
| Overheat | Oil Temperature Above 240° F Or Engine Coolant Temperature Above 244° F. | Delayed 2-3 Upshift (25-32 Mph). Delayed 3-4 Upshift (41-48 Mph). 3rd Gear FEMCC From 30-48 Mph. 3rd Gear PEMCC From 27-31 Mph. |
| Super Overheat | Oil Temperature Above 260° F. | All "Overheat" Shift Schedule Features Apply. 2nd Gear PEMCC Above 22 Mph. Above 22 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. |