Does anyone have actual steps to get to the a and c solenoid on this vehicle. Also, are there any diagrams or instructions on testing the TCM? this vehicle runs great but seems to not want to catch in 3rd gear at times. Other times it runs absolutely fine for hours. It almost always is running and shifting well until the engine warms up and even then is still sometimes fine. This seems rather erratic to be the actual transmission. We get codes P0734, P0760 and P0750 which all seem to indicate solenoid issues or potentially the actual control module. Any help would be greatly appreciated.