i searched but all i found was what people are running and not exactly how you can tell what I need....i have a hot bodies truggy and im pretty sure right now all it has is just grease in the diff.....heres my problem, taking off from the line only my front tires are pulling realllyyy hard and balloon up as my rear tires sort of just spin but not all that much....im debating where i should put my oil..front center or rear ?..also coming out of the corner the inside front tire is like .5" skinny..haha and the rear act like they dont even spin half the time

To get more power to the rear you need to put fluid in the center diff. Start with 10wt. Now going into turns it will let the inside tire spin faster so you need thicker fluid to get more traction on the outside wheel. The setup to start with is like 5/10/3-7/10/5. You dont want too thick in the rear or it will push into turns and you dont want it too thick in the front or it wont steer good. Most all diffs that I know of use grease but that never works because the front tires always unload and baloon like crazy.

thanks alot, ill going to try it tommorow