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 upshift occurs and torque converter engages.
4. Stop the vehicle. Depress Transmission Control Switch (TCS) to activate D range. Repeat Step 3. Transmission will make all upshifts except 4-5, and torque converter clutch 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 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 transmission range selector lever from D position to first position and release the accelerator pedal. The transmission should immediately downshift to third gear. When vehicle speed drops below 32 km/h (20 mph), the transmission should downshift into first gear.
7. If transmission fails to upshift/downshift or torque converter clutch does not apply/release, refer to Diagnosis By Symptom for possible causes. 5R55S Automatic Transmission