what causes vibration ONLY under acceleration? This happens only at certain speed. during that speed, my car vibrates really hard! But as soon as I let go, it cruises smooth. So, the only thing I can think of is axle related. Any ideas? It vibrates as if I have a blown tire and shakes really hard. Any comments will help!

I have a post that details this floating around somewhere, try to search for it.

In a nutshell I'm willing to bet money it's one of your axles (even if the cv-boots arn't torn).

http://forums.2gnt.com/dcboard.php?az=show_topic&forum=4&topic_id=65139&mode=full

^^^ is this the thread? Good info! It really does sound like my axles. Then next question. Is it worth buying a beafy axle(like stage 2)? I've been looking at http://www.driveshaftshop.com/item135637.ctlg as an idea, but as you can see $700 isn't cheap! I am planning on pushing some power this year. Is there any other good place to buy beafy axles? or just autozone ones?

Yup that's the thread I was talking about :). If your going to be pushing a LOT of power I'd upgrade them. You can also get race axles from http://www.raxles.com/ and from Hahn.

If you arn't running a whole lot of power, I'd get Advance Auto axles or O'Reily axles (both offer lifetime warranty's on them, so you can replace whenever, however often you want). AutoZone axles suck don't get them, and with NAPA you can't loose your reciept else you're screwed.

*double post*

My internet is being gay (said page not found).

*triple post*

really gay....