Vibration while stopped in drive Options

[mimicit]

I have a 96 St AT. When I am in drive with the breaks applied, I get vibration in the steering wheel. It's not real bad, but I notice it.

I just replaced the drivers side CV and dumped some AT fluid out when I pulled it. I Checked the levels and it reads good for HOT, that was a little weird as I expected to have to add more.

I have been driving around this weekend testing the new CV, and the vibration is really noticeable now.

I put it in neutral and it goes away. Every other gear including reverse vibrates. Park does not.

I ran a search for this symptom before I posted, and this is my first post, so hi!

[senick]

I have a 95 ST with AT, and it does the exact same thing. Two things effect this though: how fast I accelerate, and how much gas I have in the tank (you think it's crazy but I promise there's a definite correlation- a more full tank means less vibration). I have about 160k on the engine. I've yet to change the idle, but I've thought of doing it in the past, it's just the shaking doesn't really bother me at all if I drive modestly.
My suggestion, put some fuel system cleaner through it and a tank of premium, and that should make it more bearable. Change the idle if it's really something you can't stand, but I don't think it's a serious issue.