Where does it work....

[BP-Revo]

It's not so much saving the motor (though this is more of a concern with 1/8" shafts), but rather saving the drivetrain from sudden stress like landing a jump under throttle or going over a bump that causes the wheels to spool up for a second before catching. Stuff the would normally cause a shock in the drivetrain get's absorbed.

This system does exactly what a slipper clutch does, but the slipper and differential are all in one, compact, strong, weight-saving unit. Usually, to get both a slipper clutch and a differential you end up with a transmission, which is much bulkier and heavier (and has more rotating mass) and has much more weak points and areas that can fail. Any number of the gears in the transmission failing = loss of power. Any of the pins holding the gears failing = loss of power. Transmission case flexing resulting in gear mesh failure (and stripping of gears) = loss of power.

Any of the above failures which could occur in a transmission just simply cannot occur on a slipperential since it doesn't have those parts to fail.