put a mark on the rear tire. Jack up the truck so you can see the driveshaft. count the revolutions of the DS as you turn the tire one revolution. 3.5 DS revolutions per one tire rev is 3:55s, 2.7 is 2:73s etc...GA
05GT, 09 GT500 Drivetrain, 2.6 pulley, JLT intake, 18x9.5 GT500 wheels, 14" Brembos, 2014 rear brakes, 14 cooling fan, Cortex racing Koni Coilovers, Cortex Watts Link BMR:K-Member, Tube rad support, adj upper third link, rear relo brackets,JBA long tubes and catted mid pipe, Stillen adj front & rear sway bars, Bump steer kit, Steeda shifter, Spydershaft Aluminum DS.
John Lund tune, 568 rwhp, 560 tq.