have you got the manual for the truck? something ie realy wrong with that diff, pull the diff apart and put it back together as per the manual. there is exploded views on the traxxas website, just incase you dont have the manual...
http://www.traxxas.com/products/elec...pede_views.htm
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i took the whole transmission apart every part inside it look good, I have the manual for the truck i have the nitro stampede i think am going just buy all the parts for the dif and the diff sides as well and build me a brand new one and try it in the truck or should i just rebuild the one thats in it idk i just want to get it runing