I had to replace the differential gear on my evader... I've got it installed and the car doesn't want to go full speed. It didn't want to move at first but i adjusted it a few times (1/8 in each time) but i'm not sure what the hell the manual means by "just snug." I don't want to overtighten it because thats what killed it the first time. The manual also states that it shouldn't be run too loose. PLEASE HELP!!!!!