1. GM
2. Chrysler Dana 70 HD dually axle - two complete axles
3. another used by Ford Dana 70 rear axle assembly
all free floating
Dana 70 is a very good and strong axle, especially desirable for its full-floating design with 35-spline shafts, which provide superior strength and load-carrying capacity compared to many Dana 60s. While it's a heavy-duty axle, making it great for trucks and off-roading with large tires, its significant weight and width, particularly with drum brakes, are drawbacks that can be addressed with modifications like disc brake conversion and housing shaving for better ground clearance.