GET A TRANNY TEMP GUAGE! This will help save the life of any tranny. When you are towing and the temp gets too high, pull over for a while. Better to sit on the side of the road and lose 20 minutes of drive time than drop $2000 when the tranny melts. I think this (along with many other things, grrrrr) should be standard on any HD vehicle with a tow package.