Ahhhh
Water will make a gooooy yuck for sure...
Considering the possibility of water.....Good plan to get the carrier out and check the bearings....
Look at the rollers as well as the races for rust (Etching) Once this starts it will eventually lead to breakdown of the surface of the bearings and then the bearing will eat itself and by the time you hear the bad noises you have a huge mess to clean up......
Easy task to yank the diiffy apart and pull the bearings.
Keep all the shims in their original locations and replace the bearings/races.
Water that gets in and is flushed out promptly will usually not cause issues.
Letting water sit in the mix for any length of time will do damage.....Since you are in there....Now is a good time to fix it....Wash out the pumpkin and tubes.....Be all good to go...
After they eat themselves, getting all the ground up metal cleaned out is a real challenge