[RC-Monster Mike]

I am not familiar with the Caster motor mount, but the Slipperential will drop right into the center diff area (same size as the stock diff from bearing to bearing). The motor screw slot length would be the determining factor(in other words, it will work no problem, but gearing opportunities will be limited by the caster motor mount). My mugen motor mount with the caster shims would work perfectly on the Caster truggy. :)