i took this out of my 89 turbo trans am about two weeks ago. i sold the car and the buyer did not want to pay the extra cash for it, so i put the stock rear back in. it only has 1500-1600 miles on new posi clutches and bearings. during those miles it was not raced or driven with drag radials. (i had motor problems, which is why i sold it). it bolts in using the stock torque arm and i left new urethane sway bar bushings on it as well as brake lines. it has 3.55 gears. i can email pictures if you like. summit sells the empty housing for over $1500, i want $1650 firm. local pick up in peabody MA 01960 i don't want to ship it. email for more info (i don't check this site that often) dfbram@hotmail.com