I have a 2007 limited. I went on a long trip and thought it seemed like it was running a bit rough after a trip through the grapevine (mountains on the way to Southern CA). I thought I might have noticed a trans slip or 2 but I couldn't be certain. Then my car started in the limp home mode. I took the truck into Ford and they plugged it in. They told me that it was the transmission valve body and that it would have to be replaced. The truck has a 100k drivetrain warranty right? They told me that the valve body...which is inside the transmission, was not covered by the drivetrain warranty. $850 estimate. Does this sound right?