Shift Point Road Test

Shift Point Road Test

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 selector lever in the (D) position.

3. Apply minimum throttle and observe the speeds at which an upshift occurs and the torque converter engages. Refer to the following Shift Speeds chart.

4. Stop the vehicle. Press Transmission Control Switch (TCS) to cancel the Overdrive (O/D) range. Repeat Step 3. Transmission will make all upshifts except 4-5 and Torque Converter Clutch (TCC) apply should occur above 46 km/h (29 mph).

5. Press the accelerator pedal to the floor, Wide Open Throttle (WOT). The transmission should shift from 3rd to 2nd or 3rd to 1st, depending on vehicle speed and TCC should release.

6. With vehicle speed above 48 km/h (30 mph), move the selector lever from the (D) position to manual 1st gear position and release the accelerator pedal. The transmission should immediately downshift to 3rd gear. When vehicle speed drops below 32 km/h (20 mph), the transmission should downshift into 1st gear.

7. If transmission fails to upshift/downshift or TCC does not apply/release, refer to Diagnosis By Symptom Diagnosis By Symptom for possible causes.

Shift Speeds