And then this happens:



The shops thinks (and, reluctantly, I agree) that my rear diff has broken. When I backed it out of my parking spot, I thought I hit something. There was noise, and I thought I'd gotten my bumper hung up on something. After driving it forward and backward a little bit, I decided not to risk any more driving. So, I had it towed to a nearby shop, and they'll look at it Monday.
Please, God, let it just be a broken tooth on a spider gear...

05 WK 5.7L
K&N 57 series CAI
True dual Flowmaster exhaust