Hi... I have a 2004 Mustang (built 04/04) & I'm trying to determine what rear axle is installed. The axle code on the door plate is Z5 and the codes on the tag at the differential are: V268B 3 27 75 4D16. The carrier has a 10 bolt cover. I *assume* this is a 3.27 ratio, but is it a limited slip unit? The car has 4 wheel disc brakes with traction control. Thanks!