When an enthusiast builds a high-performance engine, swaps a more powerful engine into a car, or mounts sticky tires the driveline components simply can't handle the added torque and fail. The performance of the driveshaft, differential, axle, and other driveline components needs to match the performance level of a particular engine, so maximum efficiency, longevity, and reliability can be realized. Everything you need to know about selecting the most desirable gear ratio, rebuilding differentials and other driveline components, most importantly, matching the correct driveline components to engine power output. Learn how to set up a limited-slip differential, install high-performance axle shafts, swap out differential gears, and select the best available products for the driveline. It explains rear differential basics, rear differential housings, rebuilding open rear differentials, limited-slip differentials, factory differentials, ring and pinion gears, axle housings, axle shafts, driveshafts, and U-joints.