This book will teach you everything you need to build or rebuild your rear end differential. You'll learn how to repair and diagnose problems.It covers, gear ratios, pinion gears, aftermarket differentials, axles and more. You'll learn how to match your engines horsepower output to the driveline and what components to use. It teaches setting up a limited slip or Posi-Trac system, open differential and locker differentials Covers, spools and mini spools, differential gear swaps and high performance axle shafts. From teardown and inspection, to installation, everything is covered.

In the 'Ring & Pinion Gears' section the book explains Hypoid vs. Spiral bevel gear systems, speedometer-driven gears, tire size and gear ratio, gear tooth geometry, disassembly and reassembly of ring and pinion gears and ring and pinion gear break in procedure. In the 'Factory Limited Slip Differentials' section, GM, Ford Mustang and Cone style limited slip differentials are covered. The 'Aftermarket Differentials' section explains the difference between limited slip differentials, open differentials, lockers, helical technology, viscous control technology and torque vectoring. Setups for Chevy 12-bolt, Ford 9-inch and Dana rear ends are explained.