Vibration Finder tool

[Yadkin]

One of the low IQ members here suggested something on the order of lifting the vehicle by other means, I assume jacks or something, to diagnose the problem. I of course did that weeks ago using my SafeJacks, and didn't find any problems because it only occurs when the suspension is not dynamically loaded. I purchased a pair of Rhino Ramps last week so I could attempt to diagnose with the suspension not dynamically loaded.

[Tikiman]

Originally Posted by simpleman68

It's not hard to have a cd that runs a spectrum sweep from 20Hz - 20kHz (freq range of red book CDs) to find the resonant frequency of the problem area.

I can't imagine you'd be able to generate enough SPL to reach heavier parts like suspension components etc that would never "rattle" with the 95db average a factory stereo could produce.

Interesting concept that would work for interior parts though.
Scott

A long time ago, I worked with a young fellow who had a Honda that he put subwoofers in the trunk and a large amp to drive them. He would listen to his music so loud that the spot welds on the body panels failed. The car was literally falling apart from the vibrations of the bass.

[Tikiman]

Something in the front suspension of my wife's Yukon XL squeaks and groans when going over speed bumps if the weather is below 30 degrees. Doesn't happen when the temps are warmer. I think it may be a shock.

[simpleman68]

Originally Posted by Tikiman

A long time ago, I worked with a young fellow who had a Honda that he put subwoofers in the trunk and a large amp to drive them. He would listen to his music so loud that the spot welds on the body panels failed. The car was literally falling apart from the vibrations of the bass.

It's insane what these guys are pushing. It used to be ~150dB range but I just looked it up; the record is 185
That will shatter glass with ease.
Scott

[DJ_Critterus]

Originally Posted by Yadkin

That was funny the first 400 or so times.

It was funny that time too

[slewfoot]

Originally Posted by Yadkin

The noise is in the Porch, a damped rattle, sounds like rear suspension. At slow speeds, not when turning or with a load in the rear of the car. That's all pointing to sway bar bushings or shock mounts, but I was under the car while it was on ramps for over an hour/ day trying to diagnose it. It's all tight.

Are you still fooling with that? You have been looking in all the obvious locations, maybe start where it is not. Maybe it is inside the vehicle. Storage location? Internal bumper parts

[Big bob]

Originally Posted by Yadkin

The noise is in the Porch, a damped rattle, sounds like rear suspension. At slow speeds, not when turning or with a load in the rear of the car. That's all pointing to sway bar bushings or shock mounts, but I was under the car while it was on ramps for over an hour/ day trying to diagnose it. It's all tight.

Check your soup cans.