we purchased this truck, only 10,000 miles.does not do this all the time. in the last year have problem shaking,cold start, take off shakes really bad, than goes away,shakes more when we pull the boat, starts shaking when we take off then levels out? now shaking when we turn a corner hanna chryselr cannot find anything wrong, my warranty is about to expire,i even drove the truck in with the boat on it, and they could not get it to shake. could this be a tork converter? could this be the power steering is going bad?