This is a used 8.8 inch ring and pinon that originally came out of a 2002 Explorer but this ring and pinion will work in 8.8 Mustang GTs and F150s with the 8.8. This ring and pinion comes with 3 quarts of Synthetic 75W140, which costs about $20 a quart, also a new crush sleeve and a tube of silicone. You will still need new bearings and to have it installed by a professional to reduce the chances of the gear whining.