Water in differentials?

Hello everyone! I recently bought a 2015 Toyota Tacoma trd off-road. I went "off-roading" which was not even that off-road. I went through a small pond that was up to the middle of my rim. I read later that if you get water in your differentials it can cause vibration. I just drove down to Florida from pennsylvania. I feel like I can feel vibrations in my pedals but I'm not sure. I took it to a dealer and they said it might be my tires. I'm coming in here because I was hoping someone could help me out possibly describe what the vibrations are like and where I would feel them. I'm hoping I'm,just paranoid. The vibrations aren't strong at all and I feel them most at slow speed 1-10 mph when I'm turning. Any help would be great.

 

Thank you. Its been bugging me really bad. You don't think there are any serious issues though right?

 

Thank you both for responding.

 

It's probably the tires

 

I used to off road my old CJ7 through creeks, mud bogs, and ponds. I changed my diff oil once a month in the summers of my youth. It looked like marshmallow fluff when it came out and the diffs were never my problem on that old thing.

 

Extending the diff breather is a "hero" mod. It's very easy (not technical) and doesn't take long to do, plus it's one of the mods that really does help out your truck. If you're no mechanic, it makes you feel like one!