Originally Posted by Tom C 56

Before I bought the truck, I checked out on various forums, owners comments on Raptors. The biggest complaint is the driveline "clunk" that most SuperCrews have. I told my dealer and when he contacted Ford on April 11, they sent a copy of SSM 21779 saying "Some 2011 Raptor vehicles may exhibit excessive clunk or a chirp/slip/bump condition from the driveshaft on accelleration from a stop or when bringing the vehicle to a stop. Greasing the slipyoke or driveshaft replacement will result in repeat repair attempts. Engineering is investigating and is developing a service repair procedure. Effective date: 3/09/2011"