Rivieraracing
Full Access Member
A way of checking if it is working is compare how the truck shifts when the tow mode is on and then off, when it is on it will want to stay in the gear it is in longer and more deliberately compared to when it is off, when it is off it will wanna change gears more freely and not as high RPM's, kinda hard to explain instead of showing in person, try them both there should be a shifting difference!