Yeah check the 4 bolts that secure the spur to the differential housing like the above poster mentioned. The diff housings fit very snug against the gears and you have to be mindful of them being flat against one another before and while tightening. The build tolerances of this kit are spot on and require a watchful eye. Good Luck

MP[/SIZE][/B][/QUOTE]

Better explanation, my writing needs improvement just like my driving, RC cars that is!!!!!