[RC-Monster Mike]

Quick note on the crunchy gears - the gasket that seals the ring gear and diff cup is important - if it is too thick, the gears inside will have a loose mesh and will therefore be prone to stripping. The diffs are prebuilt with paper gasket IIRC, but include a blue thicker gasket which may or may not cause backlash issues - make sure the gears have a smooth, but not sloppy mesh(I like a slight notch on a new diff build to allow for break-in).