I was running my thunder tiger mt4 g3 today and the dog bone that is a at the front of the car wasn't move but the back one was, I tried to fix it but I didn't know where the problem was I opened up the centre diff and the gears were ok but the problem still wasn't fixed. I did change the pinion gear last night could that have anything to do with it. have you guys got any suggestions on was the problem could be.cheers