This Teraflex Transfer Case Lowering Kit is very useful if your jeep does not have adjustable control arms. Additionally, this kit is useful if a Slipe Yoke Eliminator Kit is not installed. This kit lowers the transfer case 1" to reduce vibration in the driveshaft caused by increased ride height greater than two inches. This kit comes equipped with 6 lowering spacers plus all the necessary hardware. It should be noted that a shift linkage adjustment may be necessary.