I have noticed that most of the breakage is from hard landings , it may help to use lighter lube in the diffs . with the heavy lube in the diff when the truck lands on one wheel most of the force is applied to the diff cup on one side(just like having a spool)using lighter oil should allow the diff to unload through the other wheel , this will also help prevent the truck flipping on landings by allowing the wheels to accelerate quicker on landings .I found the diff and shock oil way to thick . I replaced all my shock and diff oils with lighter oil shortly after the first run , I have a couple of gallons with no problems yet . truck corners better now and the suspension actually works through the bumps, remember if the suspension does not absorb the shock the drive train will and this truck in stock form took the bumps sharply.I set my truck up soft enough so it squats slightly when it accelerates.stock it's like a plank of wood no wonder it breaks things. Roger