Shift Point Road Test

Shift Point Road Test

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

The Shift Point Road Test provides diagnostic information on transmission shift controls.

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

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

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

3. Apply minimum throttle and observe vehicle speeds at which an upshift occurs and the torque converter engages; refer to the Shift Speed Chart.

4. With the transmission in (D) (4th gear), press the Transmission Control Switch (TCS). The transmission should downshift to 3rd gear. Release the accelerator pedal; engine braking should occur.

5. Press accelerator pedal to floor, Wide Open Throttle (WOT). Transmission should shift from 3rd to 2nd gear, or 3rd to 1st, depending on vehicle speed. Torque Converter Clutch (TCC) should disengage and then reapply.

6. With the selector lever in the (D) position and vehicle speed above 80 km/h (50 mph) and less than half throttle, move the selector lever from the (D) position to the manual 2 position and remove pressure from the accelerator pedal. Transmission should immediately downshift into 2nd gear. With selector lever remaining in manual 2 position, move the selector lever into the manual 1 position and release accelerator pedal. Transmission should downshift into 1st gear at speeds approximately below 45-56 km/h (28-35 mph).

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

Shift Speed Chart

NOTE: Shift speed ranges are approximate for all applications. For specific applications (engine, axle ratio and application), refer to the Automatic Transmission Specification booklet. Do not exceed local speed laws.