Ok having some problems getting to the bottom of a bad vibration when going down the interstate..all of that can be found in another thread here:

https://www.gmforum.com/pontiac-168/need-help-vibration-comes-goes-300467/

Anyways, I have gone over everything that I can possibly think of and all that is left in my mind is the motor mounts. So I shot this video to get peoples opinions on whether this is normal movement or excessive.

I start the car and rev it in park a couple times...then you can see the motor jerk when I put it in drive (foot on brake of course) and when I give it gas it rocks a good amount in my opinion.

I switch to reverse and do the same, then back to drive. At 34 seconds you can really see what I mean by it moving when I go from park to drive.

http://smg.photobucket.com/albums/v7...=VIDEO0033.mp4

Is this normal, or not, as if not it is going into a shop or dealer to get them checked/fixed. I just can't think of anything else that could be causing my problem.

Thanks

yup that would be the front marshmallow that mounts to the front of the trans

Easy to fix, or do I need to take it in?

easy fix if ya have a sports store around to grab 3 hockey pucks and a hardware store to get a 1/2" by 8" bolt 4 washers and 2 lock nuts. then its a jack and hand tools to remove and replace

stack the 3 pucks on top of eachother put tape around them drill a hole straight through the center. put in car insert bolt with 2 washers on head end and then 2 washers on top then the 2 nuts to finish it off

lol is that the recipe for a makeshift motor mount?

yup makes it a solid front motor mount

Ok so which of these do I need?

http://shop.advanceautoparts.com/web...1465700226____

or

http://shop.advanceautoparts.com/web...1151615307____

you need the first one

Yup, I went out this morning and saw that it was that one I needed. Had the wife sit in the car this time and watched that mount...definitely broken, when giving it gas in gear the mount would actually lift off the frame at least a half inch...looks like it had separated. Mount is going in shortly, and I really, really hope somehow this is my vibration problem, although I doubt it, but I could finally be done trying to find the problem.

It'* funny though, if I hadn't been looking for this vibration, I wouldn't have known the engine mount was bad, the rear rotors were warped, or the front wheel bearing had gone bad. Guess it is good I found it all and fixed it for my little sister before she gets it.

Replaced my mount last year with the hockey puck method. Don't even notice a difference from the stock mount except less money out of pocket and a slightly quicker pickup. Used 3 pucks and a grade 8 bolt/lock nut.

Not worth the extra money IMO because eventually the new one will do the same thing whereas the hockey pucks mount is pretty much good for life