Automatic Transmission Up Or Downshift, Or Engagement Concerns
WARNING: This page is about a different variant/trim than selected.
- Check Transmission Fluid
Ensure engine is at normal operating temperature. Check transmission fluid level and condition while engine is running and transmission in Park or Neutral. If fluid is okay, go to next step. If fluid level is low or fluid needs to be changed, service transmission as necessary. - Check PIDs
Using scan tool, access and monitor TR, SCCS M, 4X4L and VSS PID from PID/DATA MONITOR & RECORD menu. See PARAMETER IDENTIFICATION MODE and DRIVER OPERATED CONTROLS CHECK under ADDITIONAL SYSTEM FUNCTIONS in SELF-DIAGNOSTICS - 7.3L DIESEL article. If scan tool displays the correct PID value for each PID selected, perform steps in RUNS ROUGH, MISSES, BUCKS OR JERKS, HESITATION, STUMBLES, SURGES (ON ACCELERATION OR CRUISE), LACK OR LOSS OF POWER, OR POOR FUEL ECONOMY symptom. If scan tool displays an incorrect PID value for any PID selected, perform appropriate test listed in PARAMETER IDENTIFICATION VALUES table under DRIVER OPERATED CONTROLS CHECK under ADDITIONAL SYSTEM FUNCTIONS in SELF-DIAGNOSTICS - 7.3L DIESEL article.