My h2 and water

[Swoffy]

On the weekend i got into a pissing match with a friend and his jeep.
long story short we got a little competition going and the first event we choose ended up neither of us completing the water/hill.
i added 37" baja claws to my rig. My question is, i had my truck in water just over the tires, should i be expecting problems?
here's a link to the video taken....
http://www.badthumper.com/Forum/viewtopic.php?t=136
Truck was working just fine until today at idle i feel a few thuds?
kinda weird......
any input would be great thanks......
Sorry but i cant stand the the jeeps better than the hummer thing so i wheel my rig to the extreme to show its capabilities......