2008 sterling 10.5 with a new, never run detroit true trac and yukon install kit. The locker and bearings have not been used, but the 3.73 gears have 78K miles on them. I purchased axle to throw into my 7.3 and had the locker and install kit installed. Ended up selling the truck. Needs your calipers and rotors, but if you are looking for a better locker than the factory limited slip, this thing is ready to run