Dana 70 Ring and Pinion

Dana 70 ring and pinion gears are built for extreme torque and towing in heavy-duty 1-ton trucks. The Dana 70 rear axle — most commonly found in the rear of 1994–2002 Dodge Ram 2500/3500, 1973–1992 GM/Chevrolet 2500/3500 (C/K series), and select Ford/International 1-ton applications — features a massive 10.5" ring gear that bolts to the carrier with 12 × 1/2"–18 bolts, a 1.750" diameter 29-spline pinion shaft, and is visually identified by its 10 cover bolts.

The ratios available on this page (3.54, 3.73, 4.10, 4.56, 4.88, 5.13, 5.86, 6.17, and 7.17) compensate for larger tires, restore low-end power, improve acceleration, and maintain crawl capability during heavy hauling or off-road use. High-quality aftermarket sets from brands like Revolution Gear, Yukon Gear, USA Standard Gear, Motive Gear, or Spicer fit the Dana 70 precisely. Carriers support 4.10 and numerically lower ratios on one side and 4.56 and numerically higher on the other. A master install kit (bearings, shims, seals, crush sleeve) is required for accurate backlash, preload, and contact pattern.

Pairing these gears with upgraded axle shafts, heavy-duty bearings, or differential covers helps the Dana 70 handle massive torque and abuse reliably. Whether you're re-gearing a Ram 2500/3500 for towing, strengthening a GM 3500, or building a durable heavy-duty rear axle, browse our Dana 70 ring and pinion sets to find the ratio and quality that matches your project.

Dana 70 axles have a 10.5" ring gear that bolts to the carrier with (12) 1/2" – 18 bolts. The pinion has a 1.750" diameter shaft with 29 splines. This axle can be visually identified by its 10 cover bolts. The carriers available support 4.10 and numerically lower ratios and 4.56 and numerically higher ratios. Ring and pinion gears are available in ratios: 3.54, 3.73, 4.10, 4.56, 4.88, 5.13, 5.86, 6.17, and 7.17.