Originally Posted by
protc3
Building a good diff is EXTREMELY important. You want it as free as possible with no slip when you get on throttle. You never want the diff to slip. This is not a tuning option,it is a cover up for an off centered axle. You want your diff just tight enough that with a fresh pack and motor, it doesnt slip when you gun it. You want it to be extremely free also.
There is only one way to achieve this; Slapmaster thrust bearing. You can make your own too if you figure out how it works, but its so much easier and cheaper to get the original.
You can run your diff very loose with it and it just wont slip. Also your diff plates last forever. I build my diffs with ceramic balls and it's pretty much build it and forget it, even in mod.