Play in driveshaft CV joint
While installing a Torsen differential in my 2011 Mustang GT, my mechanic, who races a Mustang in NASA American Iron class, found some rotational play in the rear CV joint on the driveshaft, about two or so degrees of rotation, enough to see, barely. He said that wasn't normal. The front CV joint has no play. I bought a used driveshaft on eBay and it has about the same amount of play in the rear joint. According to everything I've read, CV joints aren't supposed to have any rotational play. I was wondering if anyone else has seen this on their car.
Installing a one piece driveshaft isn't an option because it isn't legal in SCCA E Street Prepared class, not to mention that it's quite a bit more expensive than a new OEM two piece.