Well, i have got the chance for a slash 4x4, i want it bad, (this is going to be a bashers car, no racing) but the rear diff is gone, it is completely destroyed. The front sounds like its skipping. I dont know if it needs to be shimmed, or if its lost teeth. So, i had the idea- can a summits locking diffs and 2-speed transmission fit? It would be a unique and cool project. Any opinions? I have never seen the size difference (if there is one) and i don't know how the servos would mount in it. Any opinions guys?