my car has been making a quite howling/sueaking noise when turning corners real slow.
also when i gear down the rear end feels like it is locking and giving me a real slight wheel hop. it feels like it bounces a bit when gearing down

any ideas of what it could be

 

You might need to add some limited slip additive.

 

you did not specify if you had the auburn or torsen differential, if it's the torsen it's time to replace it...