SA 54424 RC 3x3mm Bushings

Tamiya 54424 RC 3x3mm Bushings - for Ball Differential (12pcs)

By replacing diff balls with these bushings the differential effect can be disabled to give the same effect as a spool diff. If the diff receives a strong enough shock, in the event of a crash, the bushings will allow the diff to slip, providing a slipper clutch effect.