The dana 35 is what is called a C-clip Semi-float axle. The semi-float means that the actual axle shafts are taking the weight of the vehicle (no independent wheel bearings like front axles or big work trucks). The c-clip means that the axles are retained by c-clips in the spider gears. ALSO on a c-clip axle, the bearing is not pressed onto the axle shaft. instead, the outer race and rollers are pressed into the axle tube, and the inner race is the axle shaft itself. There is a hardened polished section of the axle shaft that take all the up/down force. If a bearing fails, It always takes out this hardened section because it is the race. When this happens you get to replace the bearing AND the axle shaft. That is one of the reasons the d35 is hated so much.

1. You snap a shaft, nothing is holding in the axle anymore and the wheel and what is left of the axle falls out.
2. If/When the axle bearing fails, it takes out the axle shaft with it.
3. Weak axle tubes
4. Itty bitty (or cute) internals.