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 selector lever in (D) range.
3. Apply minimum throttle and observe speeds at which upshift occurs and torque converter engages. Refer to the following Shift Speeds Chart. Also refer to the 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 4-5 and torque converter clutch apply should occur above 46 km/h (29 mph).
5. Press accelerator pedal to floor, wide open throttle (WOT) Transmission should shift from fourth to third, 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 transmission range selector lever from 0 range to 1 range (LOW) and release accelerator pedal. Transmission should immediately downshift to third gear. When vehicle speed drops below 32 km/h (20 mph), 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.









Shift Speeds-KM/h (MPH)
a The 5R55E 4.0L EI will shift 1-3 at minimum throttle. At medium throttle the transmission will resume a normal shift pattern 1-2, 2-3, 3-4, 4-5.