1966-1996 Dana 30 Ring and Pinion 5.38 Ratio (YG D30-538)High performance ring and pinion gear sets are the benchmark of quality in the automotive gear industry. Yukon engineers use state of the art design, advanced heat treating techniques, and leading edge quality testing processes to ensure the structure and surface finish meet exacting specifications and quality standards. Whether youve added tons of horsepower under the hood, upgraded to bigger tires, are just want to optimize the traction performance