From left to right are the Dana 60, Dana 70, and Dana 80 ring-and-pinion gearsets. The Dana 60 has a 9 3/4-inch ring gear and 1.25-inch pinion shaft diameter. The Dana 70 has a 10 1/2-inch ring gear, but the pinion shaft diameter is still 1.25 inches, the same as in a Dana 60. The real step up in ring-and-pinion strength is the Dana 80 gearset. The ring gear measures a robust 11 1/2 inches, while the pinion shaft diameter takes up 1.625 inches in the pinion bearing.
Dynatrac's 40-spline Competition Alloy axleshafts are fitted with CTM U-joints, and these are no exception. The 1480-series CTM U-joints will soon connect these inner and outer axleshafts in the custom-built housing.
Dynatrac cast its own special Dana 80 centersection. It's a low-pinion design, and is reinforced in multiple places to not let the ring gear deflect from the pinion. When you see how big this pumpkin is in real life, you can truly see why this is the end in axle beef. This housing takes an 11 1/2-inch ring gear and makes the 40-spline axleshafts that enter it look almost puny.
At each pinion yoke, a 1410 U-joint transfers power from the spinning driveshaft. Should you ever put the almost unimaginable amount of stress it would take to break this axle, it will most likely break at the yoke's U-joint, instead of breaking the 1480 steering U-joints and taking the axleshafts with it.
Disc brakes are standard up front, and either disc or drum brakes can be ordered on rear Dynatrac 80s. Notice what lug pattern these 80s are? Super trick, and totally possible when ordering from Dynatrac. | 
The Dynatrac 80 can be ordered with ball joints or kingpins to attach the front knuckles. Each knuckle connects to a 3 5/8-inch-diameter axletube. |  |