Shift Point Road Test

Shift Point Road Test

NOTE: Always drive the vehicle in a safe manner according to driving conditions and obey all traffic laws.

NOTE: If equipped, turn the Power Take-Off (PTO) unit off for correct test results. For a description of PTO operation, refer to Transmission Electronic Control System Transmission Electronic Control System.

This test verifies that the shift control system is operating correctly.

1. Bring engine and transmission up to normal operating temperature.

2. Operate the vehicle with the transmission range selector lever in (D) range.

3. Apply minimum throttle and observe the speeds at which the upshift occurs and the torque converter engages. (Refer to the Shift Speed chart.)

4. Press the accelerator pedal to the floor Wide Open Throttle (WOT). The transmission should shift from 6th to 5th gear or 5th to 3rd, depending on vehicle speed. Torque Converter Clutch (TCC) should disengage and then reapply.

5. With the vehicle speed above 48 km/h (30 mph), move the selector lever to manual 3rd gear. The transmission should immediately have a 4th to 3rd shift. When the vehicle speed drops to 32 km/h (20 mph) a 3rd to 1st shift should occur.

6. If transmission fails to upshift/downshift or if the TCC does not apply and release, refer to Diagnosis By Symptom Diagnosis By Symptom for concern diagnosis.


Shift Speed
Shift Speeds - Diesel

NOTE: All shift speeds are nominal and will vary with calibration, model, axle ratio and tire size.






(a) indicates cold strategy

Shift Speeds - Gasoline

NOTE: All shift speeds are nominal and will vary with calibration, model, axle ratio and tire size.






(a) indicates cold strategy