Does anyone have any tips for the rear diff of these Pro 4s? It's the part of the car that sucks and the only design they robbed from the Pro 3. Does someone make an aftermarket diff? Can I hack some other diff into it?bradmjohnson@gmail.com

I havent had trouble with my rear diff yet. but I have had alot of trouble with a front one way if you have on of them in your car and it is not actting right it can make you car do stupied things what is going on with the rear diff?

Try using the TC3 diff screw, spring & diff nut.....
Only issue I had was with it staying tight....