Prevent front driveline issues on your lifted 2017-2022 Ford F250 and F350 Super Duty 4WD truck with the BDS transfer case indexing ring kit. At 8" of lift and above it is necessary to index the transfer case to allow the front driveline to reconnect and eliminate vibrations. Designed for 2017-2019 Diesel trucks and 2020+ 10 speed transmissions, the BDS t-case index ring kit has optimal spline engagement and is drilled to allow positioning for compatibility with a 8 inch lift height. Additionally, a high clearance transmission crossmember supplied to allow sufficient clearance.