front end rumble

I have a 99 intregue 3800.
sometimes when accelerate i get a Rumble in the front end like the tranny is going to fall out.let off the gas and it stops. doesnt do it all the time but when it does it is unnerving.

You know what... You are not alone.. I troubleshooted with AAMCO today and came to the conclusion my motor mount was bad. That alone can cause excessive vibration and a grumble from the brake pedal all through the cabin. It should be dealt with ASAP to avoid additional repairs to other components.

On a second note, has anyone replaced any or all of their engine mounts on the W-Body? It's gotta be done this weekend by me... Cheers

Hey Morpheus, just out of curiousity which mount(s) specifically, are bad on your Intrigue. Also how many miles?

Well, I'm replacing all the mounts since to be sure it clears up my problem, but the original problem lies with the front right mount. I've got only 83,000 miles which really intrigues me as to why it's goin bad already. Trust me I did my HW and had numerous opinions to back me up and it's gonna be replaced this weekend in my garage by me.. Yes I have a hoist too.. Lol Anyway I'll fill you in on the discoveries..