My '02 GT's reverse lights aren't working, the dealer said it's the switch and they'll fix it for $180. I have a feeling I can do this myself for much cheaper (famous last words), but I can't find the part or instructions to change it. Has anyone changed this part, and is it easy? Where can I buy it? I think I did find Tremec's reference to the part, it's called a "Switch Assembly Backup Lamp"