Trans mount deflection

chevrolet
equinox

#1

my suv makes a buzz/vibration when i hit a bump/manhole dip with the driver tire. it sounds MUCH more solid when i hit a bump with pass tire. as in NO buzz. i figure its a driver side issue like perhaps a ball joint or maybe a strut mount. i see that the rear trans mount which is on the driver side of the suv

is this and is mounted vertical so the trans pushes down on the rubber. i can use a pry bar and make the load go up about 1/2-3/4" if i try. is that deflection somehow making my driver side noise issue worse? or is it not really part of my problem? i dont really know how much a new mount will deflect under load


#2

Given the amount of void in the upper and lower portions of that mount and the weight on it when installed not surprised you could move it 1/2 to 3/4 inch. That’s how it is designed to move.


#3

just because i can see it does not mean it is easy to change. they are only $25 or so and may help my NVH issue? of course a GM part is not 25. just like the ford mount i got for 100 fixed my issue


#4

If a part is working as-designed and you replace it with another part that’s working as-designed, then the only thing you accomplished was draining your wallet and wasting your time.


#5

You are not here. You cannot say part is working as designed. That it has not collapsed to point of transmitting vibration into cab.


#6

That’s right. We’re going on what you said, which is that you’re getting 1/2 to 3/4 inch deflection on the mount. Looking at the picture of the brand new mount, it’s obvious that’s the expected amount of deflection you will get on a working mount. So unless you are wrong, and you are getting a significantly different amount deflection than you think you are, then replacing the mount will be a waste of time and money because you will still have vibration at the end of it.

…Actually, thinking about it, the deflection should mean you get less vibration. Stiffer mounts = more vibration. I got a free massage chair when I put poly mounts in my MR2.


#7

i changed the ball joint and control arm bushing as they were ordered online and they are cheap. i would say the “noise” issue is better but i still feel something “moving”. there is a bigger mount under the battery tray. that mount is for the top of the trans and the mount i have pictured is for below that area. maybe 1ft away. maybe the battery mount has more impact on my issue?
there are 3 on driver side. low front of motor/trans point, top of trans and bottom/back of trans. and only 1 on the pass side

i have had 2 other vues with the v6 but i only drove 1 for a few months. i had no issue with a similar vibration sensation on those. i am waiting on title from dmv for this equinox so i might drive it for a few months also. it might be ok thru the winter as i dont drive far and awd would be ok. but i dont see keeping it for long


#8

now that i changed my wheel bearing the whine is gone so i can concentrate on other noises now. but today i noticed the quiver/wiggle sensation just as the trans shifted from 2-3. like the motor might be moving during shifts? which may point back to my theory of something moving when i hit bumps. maybe i really do have 1 or more motor/trans mounts that are loose?


#9

loose or worn out…