Features and Benefits: To ensure a proper fit. The axle is 100% measured after assembly. The threads are precision rolled to ensure a proper fit when installing the axle nut. Boot clamps are pneumatically crimped to create a perfect seal between the boot and housing. We Select Engineered (CSE) technology ensures that all CV axles meet or exceed OE form, fit and function. High-quality grease withstands high temperatures and high torque for long-lasting, reliable performance. Transmission seal diameters are precision machined after heat treatment to ensure proper surface finish for long seal life. Splines are precision rolled to ensure proper fit of the axle into the mating hub and transmission, eliminating installation issues. 100% neoprene covers are designed with extra bellows to resist bellows stress and ozone cracking, the leading cause of cover failure.