Replacement Ring & Pinion Set For Dana 44Hd In 4.56 Ratio USA Standard GearUSA Standard replacement Ring and Pinion gear set for Dana 44HD in 4. 56 ratio. USA Standard ring and pinion sets are the right choice to add confidence to your install. USA Standard Gear offers a full line of ring and pinion sets for a variety of common and hard to find applications. USA standard gear offers a standard one year warranty against defects on their ring and pinion sets Features and Benefits: Fits Dana 44HD Differential 4. 56 ratio Rear,