Shift Point Road Test
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Many transmission faults set one or more DTCs in the PCM/ TCM. In some instances a group of DTCs may indicate a particular fault. The transmission may only operate in default or failsafe modes while certain DTCs are set. Clear DTCs before starting the Shift Point Road Test.
NOTE:
Always drive the vehicle in a safe manner according to driving conditions and obey all traffic laws.
Most performance based automatic transmission DTCs require the fault to be detected multiple times before setting a DTC. In many instances the faults musts be detected consecutively a predetermined number of times (up to five). Performing the shift point road test as detailed below increases the likelihood that a DTC sets if a fault is present in the system.
- Bring engine and transmission up to normal operating temperature.
- Operate the vehicle with the selector lever in the D position.
- From a stop, accelerate the vehicle to 80 km/h (50 mph) with the shifts occurring at approximately 2000 rpm. Stay in 6th gear for 30 seconds or until the TCC applies. Repeat this two times.
- From a stop, accelerate the vehicle to 80 km/h (50 mph) with the shifts occurring at approximately 3000 rpm. Stay in 6th gear for 30 seconds or until the TCC applies. Repeat this two times.
- If the transmission fails to upshift/downshift, REFER to: Diagnosis By Symptom .