The diff setup is exactly the same between the two. You can use a 1.0 gearbox and bearing inserts if you want, but the 2.0 versions are better. I too never had issues with diffs on the 1.0, but I also never had outer bearing troubles, if you get my point. It's a different truggy, so it has different issues. I really don't think the gearbox is the problem. The guy that is doing the XT8 mods(Mark Mader) did some testing and decided the pinion was the problem.