Water our worst enemy.

[tom4bren]

Well, your TOD computer is under your passenger seat so that could explain the TOD warning lights you were having on the trail & the drive home.

As for the rev issue: Check your TPS, FPR ... prolly change your fuel filter too so you can rule that out.

As for the lack of power to the wheels: I'd start with fluid change in the tranny, transfer case & both pumpkins just to make sure they are not contaminated with water.

Those are just starting points. Unless your mechanic can find a problem, it'll prolly be trial & error till you find the right component that was damaged.

[Marlin]

Your main fuse box and relays are on the passenger side as well, not sure how deep in the engine bay it got on the side, but could be a culprit there, and it will take a while to dry out, try opening it up and checking.