XJ Cherokee Transfer Case Drop Kit Incl. Billet Aluminum Spacers Hardware RockJock 4x4RockJock's Transfer Case Drop Kit for XJ Cherokees and MJ Comanches is mandatory in lifted applications to reduce driveline angles. This beautifully CNC machined pair of 6061 T6 billet aluminum spacers install very simply by unbolting the factory transfer case crossmember bolts from the bottom of the frame, dropping the crossmember down, sliding thiese spacers in and then bolting the crossmember and spacers back up with the new, supplied, longer