At Next Gen Diesel, we offer 4R100 rebuild kits designed for any application. Whether your priorities are towing, daily driving, high performance, racing or otherwise, we have the right 4R100 rebuild kit for you. Next Gen Diesel branded rebuild kits are all proudly hand packed, consisting of everything needed to get the job done right. These kits are designed not to cut any corners, using only the highest quality components available for each respective application. This includes critical decisions such as the use of OEM electronics, as compared to cheaper electronics sourced from overseas. Further, these kits include all of the "final 1%" components such as O-Rings, seals, gaskets, bushings, bearings, washers and more. Ultimately, our 4R100 rebuild kits are comprehensive, durable, high-quality and easy to install!