This System is recommended for stock to 2�" lift & up to 33� tires for mild use. J.E. Reel Drivelines O.E. assemblies are designed to work with up to 2�� lifts from most lift manufacturers. It is best to measure all drivelines if possible. Note: JL 2018 Powertrain is installed at 9.25�. This means the Transfer Case rear output slopes down to rear axle and front output slopes up away from front axle. This is especially important to consider on the 2018 model JL.