If your just going to splash accros a stream or somthing like that you could redo all the vent tubes (dont forget the one on top of the trany) seal the air intake, dont forget all the axle seals and lock outs, and run it. But if you want to run under water, get a different truck! You put that wiring under water and your in big trouble! its over man! I build off road truck with my friends and have lots and lots of time with that kind of truck. And when we build them we redo every inch of wiring. To be nice the factory stuff sucks. By now its all a little dryed out, cracked, ect.... Really is it worth it? No... is it worth it to splash around? sure thats ez and fun, but under water? no way.