Western Differential has been serving Tucson and surrounding areas for over 53 years, providing professional service and experience to handle all your needs from parts to installation. With a huge inventory of top quality new and used parts, they can customize the components that are right for the job, including axles, drive shafts, front and rear differentials, and ring and pinion sets. Western Differential can put together a complete package for you with posi units, performance axles, drive shafts and brakes, making them your source for custom built differentials, parts, drive shafts, and suspension modifications.