Check and make sure you haven't lost/broken any of these:
http://www.amain.com/rc-cars/hpi-4x2.5x12mm-screw-shaft-black-6-hpi86094/p6350
(there's is different sizes just using these as a reference)
The go into the cups on each end if the dog bones and the tranny. I would start there.
Damn did a good job that's for sure....lol yeah sometimes the fixing time out weights the drive time :D. Not so bad if you already have the parts to fix it not so much when you don't lol.....nice carnage there though.
Is that a buku clutch system? Thought I saw an adjustment screw on the flywheel could be wrong though. I had the same problem with my buku clutch had to get an adjustable motor mount to get my alignment right. As for the spur shredding still think your mesh isn't right.
Literally drove it for 20 minutes jumped it once missed the ramp the second time and this happened so pissed lol. mind you its the front and back same side.
These are proline trenches 3.8 on tech 5 wheels..17mm hubs. There a nice set will have to up your gearing though they are heavy But a nice set. I also strapped these tires or I turned them inside out and put a strip of gorilla duct tape in the middle to keep them from ballooning.
these are...
Well I just bought my savage a new set of boots
Also some Dynamite shoes and mugen 1.0 springs for when my stock ones die.
New shock tower and upper arms as well. Towers were only 5 bucks from gpm racing and the upper arms too. So I figured I would try them towers... lol
Have you checked the diff housing for damage in that area? If it's out of alignment there must be some damage some where and if so I recommend replacing the whole housing.