What's a Good Replacement Rear Diff for the E-Maxx?

[TexasSP]

The problem with spools is that for anything but off road it will give you issues. It is much harder on your drive train and drastically reduces turning radius. I have run with a spool and also used to use a positrac setup and much prefer tuning the diff action with diff oil. The other thing you may not realize is that with a spool you only get rid of the spider gears but still retain the ring and pinion. No way around that really.