4s lipo in a TC3, drive shaft issues

Thanks for the replies.
I just drove it for the first time. It turns out this only a secondary issue, because I completely shredded my rear diff gears without touching full throttle once. Does anyone know of an aluminum diff ring gear and pinion for the TC3? I already have a spool in the rear, thats fine, its just the gear teeth that stripped. When I pulled the stock diff out to put the spool in there were no shims on it, so I didnt put any on the spool. But now I seethis and Im thinking I should have. I think Ill try new stock gears and shim them right. If anyone has any better ideas please let me know.
Thanks for any help.