Road Testing Vehicle

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

The Shift Point Road Test and Torque Converter Clutch Operation Test provide diagnostic information on transmission shift controls and torque converter operation.


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 vehicle with transmission selector in (D) range.
3. Apply minimum throttle and observe speeds at which upshift occurs and torque converter engages; refer to Shift Speeds chart. Also refer to Automatic Transmission Specifications.
4. Stop the vehicle. Depress Transmission Control Switch (TCS) to activate D range. Repeat Step 3. Transmission will make all upshifts except 3-4 and torque converter clutch apply should occur above 46 km/h (27 mph).
5. Press accelerator pedal to the floor, Wide Open Throttle (WOT). Transmission should shift from third to second, or third to first, depending on vehicle speed, and torque converter clutch should release.
6. With vehicle speed above 48 km/h (30 mph), move the selector lever from D range to 1 range (LOW) and release accelerator pedal. Transmission should immediately downshift to second gear. When vehicle speed drops below 32 km/h (20 mph), transmission should downshift into first gear.

Shift Speeds - MPH (KM/H):

7. If the transmission fails to upshift/downshift or torque converter clutch does not apply/release, refer to Diagnosis by Symptom for possible causes. 4R44E