Originally Posted by fyrstormer

That is how the RC-Monster.com "Slipperential" works -- or worked. It was a fearsomely complex piece of kit to assemble just-right, and it apparently didn't sell well enough to justify continuing to manufacture it after the initial production run. Slippers and diffs are just too complicated to assemble into a single unit, and it's more practical to have them as separate transmission stages, when space allows.