the kit comes with all that ****, DoDaMan was talking about just getting the .18SS engine and bolting it on the MT2 RTR chassis.

the diffs are bad, the first thing you should do when you get the truck is shim them... a couple of guys made posts about it. either way you need to shim the pinion up and the ring in so you get a good consistent wear pattern. i stripped both of my stock setups, but once i shimmed them up (and replaced the ring and pinion that i trashed) they were fine.