Having a little problem with my rear end making a clunking noise around turns, almost sounds like there's something rolling around in the bed. So far it's only done it twice, during very heavy rains. After the first time I replaced the rear diff fluid and didn't have any more problems with it. This week we had the second big rain and it started doing it again, but since it's dried out it has stopped though. Not really sure what this could be, I'd appreciate any help diagnosing this. Thanks.

 

If you have a limited slip, this is normal. It's the wheels matching up during a turn.