Just take it to the dealer, that's what a warranty is for. I blew the clutches out of mine and took it in. They supposedly rebuilt the traction lock but I'm not too impressed. The truck went from no limited slip to almost a locked rear end. They said it would 'wear in' in about 500 miles. It's doing the same clunking around turns your is, which is it's not allowing enough slip between the rear tires. I'm sure they're wrong and don't won't to re-shim the rearend, but I'll try it. I would be very careful in the rain, mine has become 'tail happy' since the dealer's work.