When lowering your vehicle, driveline angles change. This can produce unwanted vibrations during acceleration due to improper angles. If more adjustment is required, then our Driveline Alignment Kits are your solution. Belltech Driveline Alignment Kits include a variation of pinion shims, transmission and/or carrier bearing spacers, hardware and installation instructions specific to each vehicle to help make your driveline problems are a thing of the past.