The Dana 70 is a heavy duty, full floating axle with a GAWR of up to 10,000 lbs - 3,500 lbs greater than that of the Dana 60. While Dana 70 front axles exist, they are relatively rare and the most common applications are rear differentials, often as a dual rear wheel configuration. Dana offered factory installed limited slip differentials in the Dana 70, marketed as the "Power-Lok" or "Trac-Loc" differential. An even heavier duty version, the Dana 70HD, was built for medium duty trucks and some high GCWR Ford, GM, and Dodge duallies. The 70HD had larger 4.00 inch axle tubes, bigger bearings, and a higher GAWR than the standard 70.
Dana 70 Specs
| Years Produced | Various Ford, GM, Dodge | |
| Applications | 8 lug, Ford, GM, and Dodge pickups. | |
| Full/Semi Float | Full floating front/rear differential | |
| GAWR | up to 10,000 lbs, ~8,000 lbs on average | |
| Ring Gear | 10.50" | |
| Axle Spline Count | 23, 32, 35 axle spline count | |
| Axle Diameter | 1.50" rear axle shaft diameter, 1.41" front axle shaft diameter | |
| Axle Tube Diameter | 3.50" axle tube diameter | |
| Pinion Spline Count | 10 or 29 spline count pinion | |
| Pinion Diameter | 1.75" pinion shaft diameter | |
| U Joints | 1480 front universal joints | |
| Ratios | 3.07:1 - 7.17:1 | |
| Identification | "70" cast into differential housing. |  |
