Brand New in the crate. It is a GM Part Number: 15591700 -or- 26033591. National Stock Number: 2520-01-216-5611. Fits 1981 - 1987 GM or Chevy, 6 Lug, 3:08 gear ratio, with lock-out hubs. Shipping weight: 550 lbs. Location: Bldg. 5.