However, it's most commonly found on the transmission pan itself. It's often a small sensor screwed into the pan's side or bottom. Sometimes it's part of a larger temperature sending unit that may also house other sensors.
To find it:
1. Consult a repair manual: A factory service manual specific to your truck's year, model, and transmission is the best resource. It will have diagrams and detailed location information.
2. Look at the transmission pan: Carefully inspect the transmission pan. Look for any sensors or wires coming from the pan itself.
3. Trace wiring: If you can locate a wire that appears to come from a temperature sensor related to the transmission (check your wiring diagrams), trace it back to its source.
Important Note: Before working on your transmission, ensure the vehicle is cooled down and properly secured. Working with hot transmission fluid is dangerous.
