i know there was a thread about this a while ago but it was sorta dead end. i was hoping if anyone else knew anything about this. when i accelerate my car vibrations only between 45 - 60mph. at first i thought it was the tire pressure after checking that it still vibrates. any ideas?

Tire balance, Axel, bad motor mount, something loose in the suspension.

This is classic CV joint vibration- get them rebuilt or re-lubed quickly, or you may need new ones if a lot of wear has occurred.

I had this on my 95 Legend, and it drove me crazy til I figured it out and took it to GT Imports locally, who specializes in Honda/Acura. They rebuilt it for about $100 each side.