I'm at a loss... Can't determine CLUNK sound

[ss4chad]

I have this 'Clunk' sound/feel as well. I can step on the brake and give it gas and I can make the clunk come alive at will, so I was thinking Trans or Motor mount. I had previously thought it might be the rear shocks but I replaced those and the pads & rotors couple of weeks ago and it still does it.

I gotta change the trans fluid soon, while I am under there I'm gonna put a jack on the tail of the tranny and try to lift it up, then do the same with the left side engine mount and see if either are broken. If neither are broken then I'm not sure what it could be.

Chad

 

[GranPrix]

I have a feeling my clunk is the alignment pins that have decided to remove themselves from the chat group… FML

 

[JGman]

Did you get this issue solved? I just finished converting my 2011 XL from stock rear springs to air bags (stock height) due to my wife's bad back. The stock height conversion is working well and took the sharpness out of the rear. Things were fine for a couple of days, then, a clunking sound! I do all my own fabricating, so, I have to fix my own problems! Couldn't find anything loose. I finally tightened the spare 1/4 turn more. End of clunking.

 

[ss4chad]

I have a feeling my clunk is the alignment pins that have decided to remove themselves from the chat group… FML

Alignment pins?

Chad

 

[GranPrix]

So it seems I was correct. One of my alignment pins on the passenger side apparently decided it was no longer going to work and fell off. So now I no longer have that clunk sound. Which then caused the other one to inevitably do the same. I ordered some pins and a set of new alignment bolts and guides from dirtking. And the guides are great because it doesn’t allow for any movement, but the pins are horrible so I ended up getting some grade 8 bolts instead of using pins. Obviously alignments from now on are going to be a pain in the ass, but at least I don’t have to worry about losing the pins anymore.

Now the one thing I’m worried about is hitting a pothole or anything that might change my alignment. If this happens, I’m hoping the bolt that’s replacing the alignment pin shears off. But with a grade 8 bolt I don’t know if that’ll happen so now I’m debating as to whether or not to go with a grade 8 bolt.

 

[ss4chad]

Please elaborate!
Are you talking about the bolts in the Upper Control Arms (forward & Aft) that go thru the Alignment Adjuster Cam and bolts the Upper Control Arm to the Truck?
Your saying one or more of those Bolts/Pins broke?

Chad

 

[89Suburban]

Now the one thing I’m worried about is hitting a pothole or anything that might change my alignment. If this happens, I’m hoping the bolt that’s replacing the alignment pin shears off. But with a grade 8 bolt I don’t know if that’ll happen so now I’m debating as to whether or not to go with a grade 8 bolt.

I don't think you have anything to worry about in that regard.

Please elaborate!
Are you talking about the bolts in the Upper Control Arms (forward & Aft) that go thru the Alignment Adjuster Cam and bolts the Upper Control Arm to the Truck?
Your saying one or more of those Bolts/Pins broke?

Chad

Here are a few pics of the pins and locking cams from when I installed on mine.

What did you do to your NNBS GMT900 Tahoe/Yukon Today?

Strut under arm flip with the GR9 hardware.

www.tahoeyukonforum.com

 

[Big Mama]

Please elaborate!
Are you talking about the bolts in the Upper Control Arms (forward & Aft) that go thru the Alignment Adjuster Cam and bolts the Upper Control Arm to the Truck?
Your saying one or more of those Bolts/Pins broke?

Chad

I believe so

 

[mountie]

I believe so

Referring to a previous post..... Considering the 'clunk' was there before you did all your replacements, ... Check your spare ??
Or maybe an exhaust pipe or muffler mounts?

 

[ss4chad]

I don't think you have anything to worry about in that regard.




Here are a few pics of the pins and locking cams from when I installed on mine.

What did you do to your NNBS GMT900 Tahoe/Yukon Today?

Strut under arm flip with the GR9 hardware.

www.tahoeyukonforum.com

I have a hard time believing those small 1/4" (guessing size) pins would make a truck have a clunk to it. Now if the bolts that go thru that adjustment cam that you turn to adjust the alignment broke, I can see where a Clunk might be present. Those bolts are secured (tightened) as tight as crap so that the alignment stays intact. But broken small pins? I just can't get there, but I've been wrong before, my Wife can attest to that.

Chad