Hey guys so a couple of days ago my rear diff stripped so I found a working diff and filled it with some fluid I use on my emaxx (just the rear not the front) . Then I get it working then i go outside and doing some speed runs and jumps and BAM something striped. Take it apart and Im like ok so its the back diff, nope, front diff, nope, take out one little screw to check the spur and its a broken spur. Then Yesturday I go the the hobby shop and buy 2 spur gears and pop it inside, reassemble it, go outside again in my back yard and was having my yellow lab puppy chase it around and then after 20 minutes it breaks again, so I check the spur and BAM its broken again. Im not going to wast the extra gear i bought. So the Question is why are my spur gears stripping?