Was crossing a storm wash after a recent storm when my rhino hit a deep hole and went underwater and died... Got the rhino out with a dozer, when I got it to land the motor had hydraulic lock from water going up the exhaust pipe - pulled the plug and blew the water out of the cyclider, checked the oil and the level was good and no water got in the case so I fired it up and it started after a few tries... when I put it in gear it went about 4 feet then started to slip real bad. put it in reverse and it did the same thing... I was about 20 miles from the road so I drove it in low but it would slip after i got to about 5 mph - as I drove it seemed to get a little better, after the 20 miles it seemed to work fine - any ideas what would have caused the slippage since as far as I can tell the case is sealed??? Any ideas??? Also, when I checked it out the next day the oil level was low so I filled it and cleaned out all the sand and mud and took it for a drive and it worked fine but I am concerned that  it was slipping that way. any recommendations as to things I should check or replace???? Also, being that the motor was hot when it went under is their any chance of piston/ring  damage..... Thanks...