WAHHHHHOOOOOOOOO!!!!!!! My dads company got three NEW 3500HD Chevys today. I did the old kick the tires and flex the desiel grunt/clack. I decided to take a look at the rear and NO 14FF!?!?!?!?!? Looks like a D60 or D70. I couldnt tell between the two because I had no way to measure the ring gear. Why didnt GM use the 14FF? Anyone else own/us one with this rearend?