I agree with rolland completely. I think you should regrease your diffs too or check them at least. I havent dealt with nitro engines much but i did apprentise at a gm dealership for a while and se saw quite a few trucks that fell through ice on lakes etc. the usual treatment was to rip everything apart on the engine that was possible and blow it off with compresse air and put oil or WD-40 on the metal to prevent rust, then purge the fuel lines and regrease everything eg: differentials, balljoints. You are sure luckky your electronics didnt fry though, I fried mine just by getting snow in my mt2.

Good luck