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V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) Driveshafts | Differentials | Gears | Rearends | Clutch | Shifters

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Old 07-02-2013, 03:19 PM   #1
BaylorCamaro
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Loud clunking noise, new driveshaft?

So I just had installed a new alum 1 piece driveshaft from DSS, after reshaping the rear heat shield everything has been great. My office has a huge incline to get into the parking lot, and when I reach the apex of the incline I get a LOUD clunk in the rear. Specifically this happens when my front wheels are level and my rear wheels are just coming up on the apex of the incline. It sounds like my diff is going to fall out!

See below for a very simplistic illustration to get an orientation of when the sound occurs. The only thing that has been touched / changed since the start of this noise was the drive shaft and the rear sway bar was unbolted to change out the endlinks from PFADT's old design to their newer one.

I will say that I'm still having issues with the endlinks and I get a rattle while driving, despite tightening the dog sh!t out of them they still make noise. However I do not attribute a loose endlink to the loud clunk I hear.. I've heard about having to set the pinion angle when installing a new drive shaft, any truth behind that, or if that could be causing the noise?

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Last edited by BaylorCamaro; 07-02-2013 at 03:29 PM.
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Old 07-02-2013, 03:49 PM   #2
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There is no adjustable pinion angle on this car. The rear sway bar really should have nothing to do with this. As we've been texting I sent this along to Frank @ DSS for review, they are on a vacation week but I'm sure he'll get back to us as soon as he can.
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Old 07-02-2013, 03:51 PM   #3
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Quote:
Originally Posted by Matt @ FSP View Post
There is no adjustable pinion angle on this car. The rear sway bar really should have nothing to do with this. As we've been texting I sent this along to Frank @ DSS for review, they are on a vacation week but I'm sure he'll get back to us as soon as he can.
I appreciate it Matt.
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Old 07-02-2013, 03:53 PM   #4
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No problem man, want to get it squared away since I only had the wrong measurements twice for the original shaft

Also nice picture man, we need a new logo for the website interested?
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Old 07-02-2013, 04:05 PM   #5
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No problem man, want to get it squared away since I only had the wrong measurements twice for the original shaft

Also nice picture man, we need a new logo for the website interested?
Third time's a charm.
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Old 07-02-2013, 07:42 PM   #6
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The drawing is epic.

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Old 07-02-2013, 09:42 PM   #7
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MS paint skills! Had to do it quick since I was still at work, lol.

Sent from my SAMSUNG Galaxy S III using telekinesis.
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Old 07-03-2013, 03:05 AM   #8
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Quote:
Originally Posted by Matt @ FSP View Post
No problem man, want to get it squared away since I only had the wrong measurements twice for the original shaft

Also nice picture man, we need a new logo for the website interested?
Haha. I actually know a guy for that if interested. All the bolts at tight? Did you recheck them?
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Old 07-03-2013, 11:43 AM   #9
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Yup all bolts are tight. I went up the incline at an extreme angle this morning and now sound. So I'm wondering if something is flexing.
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Old 07-03-2013, 03:11 PM   #10
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There isnt anything really flexible there. If the diff mount bolts (3) are loose, it can cause a clunk, but as far as the driveshaft goes, the diff and trans are both rigid mounted. Pinion angle is only adjustable via shim to the cradle or trans mount, and should not ever be needed for 99.9% of setups.
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