[suicideneil]

UE sell a complete diff upgrade kit, though it is a little pricey (isnt everything UE makes?). That, or there are some nice HB hardened diffs on this site forsale that will work with normal maxx type alloy cases- just need to be careful when shimming them to get a good gear mesh. As for a new motor, I hear that the new 4.5 HVmAxx tends to fry the hvmaxx esc if you're not careful, so perhaps wait for the MMM, or go for a 8/9xl and suitable warrior esc to match? Im not the expert though; I mainly make it up as I go along.... ;)