Ford 5R110W Transmission 4140 HTSR Billet Steel Low/Reverse (Rear) Ring Gear Hub Ford 5R110 Low/Reverse Ring Gear Hub The OEM 5R110 rear ring gear hub failure has been addressed by TCS with our 4140 HTSR steel hub. Withstands the demands of high torque and heavy duty applications. This Heavy Duty 5R110W Rear Ring Gear is one of the most sought after upgrades because when you have high torque and lots of horse power this hub becomes a weak link! Don't let you performance transmission build fail due to this invest in this hub; its well worth it! It is one we sell everyday to Diesel Performance Shops! Note: In the 2nd photo we show you a side by side comparison of the factory rear ring gear hub beside our billet rear hub, these not only have a tremendous amount of rigidity, but have been tested with over 2,000 ft. lbs of torsional load!