Shift Point Road Tests

Road Testing Vehicle

The Shift Point Check and Torque Converter Clutch Operation Tests 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 properly.

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

2. Operate vehicle with transmission range selector lever in position.

4R70W Transmission - Shift Speeds:

3. Apply minimum throttle and observe speeds at which upshift occurs and torque converter engages. Refer to shift speed chart.

Shift Speeds - MPH

NOTE: Shift speed ranges are approximate for all applications. For specific applications (engine, axle ratio and application) refer to the Automatic Transmission Specification Issue FPS-12180-96 = model year, available from Ford Customer Service Division.

1. With vehicle in overdrive (fourth gear), press transmission control switch. Transmission should downshift to third gear. Remove foot from accelerator pedal; engine braking should occur.

2. Press accelerator pedal to floor (WOT). Transmission should shift from third to second gear, or third to first depending on vehicle speed. Torque converter clutch should disengage and then reapply.

3. With vehicle in D position and speed above 80 km/h (50 mph) and less than half throttle, move the transmission range selector lever from D position to manual 2 position and remove foot from accelerator pedal. Transmission should immediately downshift into second gear. With vehicle remaining in manual 2 position, move transmission selector into manual 1 position, and release accelerator pedal. Transmission should downshift into first gear at speeds below 48-56 km/h (30-35 mph).

4. If transmission fails to upshift/downshift or torque converter clutch does not apply and release, refer to Diagnosis by Symptom. Symptom Related Diagnostic Procedures