As you increase your horsepower and torque, you quickly find out where your weakest links are. The factory rear ring gear is one of the weakest links and has been addressed with this product. This hub is designed out of 4140 HTSR steel for superior strength and longevity. If you are building a performance transmission, this is a must-buy.
For 5R110W transmissions only: this low/reverse hub will only fit 2003.5-2010 Super Duty models with 5R110W transmissions. It will not fit early 2003 7.3L Super Dutys with 4R100 transmissions.