CARDONE's extensive experience in testing and engineering CV Drive Axles is the foundation behind our proprietary method of engineering a product that meets and even exceed O.E. performance. We have researched the reasons why original CVs typically fail and designed new solutions to avoid repeat failure. For example, our Neoprene boots are designed with additional bellows, when needed, to resist bellow stress and ozone cracking - the leading cause of boot failure. Additionally, all CV Drive Axle shafts are individually verified for straightness, resulting in vibration-free performance at all speeds. High-quality grease withstands high-temperature and high-torque demands to ensure long-lasting, reliable performance. Splines are precision rolled to ensure proper fit of CV Drive Axle into the mating hub and transmission, which eliminates installation hassles. Threads are precision rolled to ensure proper fit when axle nut is installed. Transmission seal diameter is precision-machined after heat treatment to ensure correct surface finish, promoting long seal life. CV Drive Axle part numbers with an “HD” suffix are severe-duty applications and include a thermoplastic outboard boot for increased life and durability versus a traditional neoprene boot.