1995Chevy Suburban 2500 4wd, 350, 182k

two problems at once is tough , lets start with the vibration, do you know how to check u joints ? if so check those first in the rearlet me knwo if you dont

jim

[quote:51e34e5fb1="Tankster"]I was driving down interstate 2 days ago and my truck began to vibrate severely. Enough so I could not go faster than 45 mph. It doesn't do it in park, only drive and reverse, now at any speed. I have flowmaster duals on it and it now sounds like it is strained or muffled when I drive. I don't know if the two are related, but any advice would be great! :?:[/quote:51e34e5fb1]

I had a similar problem with my suburban and it turned out to be my wheel alignment. Don't know if this helps, but it's a start.