Mods to prep for high water?

With all of the rain we have gotten recently, there have been numerous commonly-traveled areas around here that have taken on amounts of water far beyond what you'd typically see in a low street or ditch. A couple of days ago I encountered a body of standing water along a detour that was deep enough that my step bars were under water or about 3" below the bottom of the door. It was fun to cross, but it got me thinking on what all needed to be addressed on these trucks to handle modest water crossings or passing through standing water at faster speeds. Of course, I'm not talking about water that would flood the cab or crossings you'd need a snorkel to consider.

I'm aware of the the rear differential breather mod:

https://www.tacomaworld.com/threads/rear-diff-vent-behind-the-tail-light-mod.286097/

Also I'm under the impression that the e-locker on the TRD-OR's has a vent on it that needs to have the same mod done to it as the rear differential.

Are there any other things that need to be sealed up, re-routed, or addressed? On ATV's it's a common trend to put dielectric grease on all of the electrical connections. Anything similar to that need to be done on the Tacomas?

 

There is this..

 

Since your truck is a 2015, this won't apply to you, but people with older trucks may want to consider replacing the breather tubes for the front diff since they're prone to cracking with age and all the heat cycles from being routed through the engine compartment. Also, if you don't have your fender liners in anymore, there's a decent chance of kicking up enough water into the fenders to suck enough into the intake to be a problem.

Anytime you're going through water deeper than the hubs, you're risking some water/dirt intrusion anywhere there is a seal. If you do it often, you'll definitely want to make it a habit to remove the wheels every now and then to inspect everything to make sure everything is okay.

 

You should also extend the transfer case and transmission breathers. Dielectric grease is a good idea for everyone. Keeps the crap out and stops connections from sticking together.
That snorkel thing doesn't help much as you would think since your computer will go under long before the raised air intake.