Exactly as Squee mentioned. Front and rear Diff from an LSP and in the center I just popped the 46 tooth plastic spur on there. Without the change front and rear the gearing is WAY too tall to support the 46 tooth spur. You have to lower the ratio in order to use the smaller spur. (assuming the motor and batteries are the same)
Oh, I see. I was thinking for some reason that the center was how you changed the gear ratio. Cool. So was the 46T spur hard to get into the center assembly? Did you have to do much modification to it? I'm assuming the LSP front and rear diffs just dropped in to the Ofna diff housings?