if the dealer says that's the problem and its under warranty and their offering to repair it why are you going to question it,its a free repair and you,ll get a free transmission from the deal and if that don't repair it they,ll still have to find the problem with it,to me that's a no brainier right there is to let them replace it at no cost and if that turns out not to be the problem you still wind up the winner in this one,they will have to repair it because its still under warranty,man anything they want to do to it let them,while you have the warranty use it,and enjoy it,good luck.