Problem: The vehicle will not shift and is
stuck in second gear. The MIL is on.
Details: When the tech connected a scan
tool, he found a DTC P0750 (LR Solenoid Circuit). The first step
was to check the fluid level and condition. It was full and
looked/smelled normal. Next, he tested the resistance of the
solenoid pack. They were all in specifications so he tested for
power and grounds to the solenoid pack. He found that the
solenoid pack red wire was intermittently getting power. After
looking at the wiring diagram, he tested the power and ground
circuits for the transmission control relay. The circuits tested
good so the relay was determined to be faulty.
Confirmed Repair: He replaced the
transmission control relay, cleared the code and test drove the
vehicle. The transmission shifted correctly again and the MIL