08 Denali with 160k suspension question

[Big Mama]

First question is did it do this prior to the suspension work? If not, I'd double check your work. One common mistake is to do all of the bolt tightening with the truck on jacks or a lift when they need to be done with the truck under full weight. If that's all ok there's a TSB about this clucking noise. Some fix it as easy as removing and greasing the u joints or splines. Some have replaced the U joints all together. Check the forums for this noise and check the TSB.

 

[Ponchonutty]

No. I have it in my recycle pile. Yes, no more clunk

 

[Ponchonutty]

First question is did it do this prior to the suspension work? If not, I'd double check your work. One common mistake is to do all of the bolt tightening with the truck on jacks or a lift when they need to be done with the truck under full weight. If that's all ok there's a TSB about this clucking noise. Some fix it as easy as removing and greasing the u joints or splines. Some have replaced the U joints all together. Check the forums for this noise and check the TSB.

No it didn't make this noise before OR after suspension work

 

[RED TAHOE LS]

Good diagnosis on the motor mount, although the CLUNCK in the rear end is rear end torque. Vehicles used to have a PINION SNUBBER, which was a mount directlt over the pinion with a rubber mount that would cushion the torque in the rear end reducing the travel. In other words, that's the noise your hearing, my Tahoe also does it and has since new, @ 197,000 there is no affect in performance, JMHO.
David g.

 

[Ponchonutty]

Well my rear end clunk noise is completely completely gone. Would have never thought a motor mount would have noise travel to the rear like that

 

[iamdub]

No. I have it in my recycle pile. Yes, no more clunk

Any chance you could mail it to me if I paid the shipping?

 

[dirtydenali07]

I have an 07 Denali XL. It was on the lift the other day for inspection, so I checked everything I could for the dreaded thump on takeoff. Only thing I found was left front diff mount is shot. I can grab the yoke and move diff up and down about 3/4".

 

[95escahoe]

Have a similar issue on mine like this I'll check these out


Sent from my iPhone using Tapatalk

 

[iamdub]

Y'all mail your broken motor mounts to me, please.

I just need 2.

 

[iamdub]

I just thought of something: Maybe the broken motor mount(s) allowed everything to twist more than it should, causing the trans mount to break and that's why there's a clunk that sounds more rearward cuz it's pretty much under you but to the middle. I'll have to inspect my trans mount...