While driving my car it feels like its "fish-tailing", the ass end sways back and forth. It does not do this all the time just every once in a while.
I was using my foot to push on the tires and it kind of looked like something was moving on the right rear wheel. I jacked it up and pulled the wheel but everything seemed to be fine. The only thing I noticed was I was able to push the shock(strut)up pretty easy.

Anybody know what could cause this occasional "fish-tailing"??
Thanks for any help.