I have had my truck for about 10 weeks, I have 22,000 miles on it already. I'm noticing a "choppy" clutch, especially in reverse. I think I may have put a burn mark in it. I pull a large trailer and parked on a very steep hill once and it smoked going backwards. I kind of think "fat chance on a warrenty" but I thought I'd askk an opinion. Also, I'm about to add a TST box, think this clutch will stand up to it for long?