Clunk coming from rear? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

muthstryker · 07-27-2010, 11:01 AM

Hey guys, took my truck out of the garage yesterday for a ride around the block real quick and when I brake, there is a loud clunk in the rear. I can feel it too. I cant figure it out... The truck will be alinged this friday and dont plan on driving it untill it is aligned but what could this be?

Is it possible my pinion angle is off causing the drive shaft to clunk? Or?...

The correct drop shocks for the rear are on the way do you think its maybe a shock thing and I should see what happens when I replace the stock shocks with the lowered shocks?

willett · 07-27-2010, 11:39 AM

sounds like u - joints to me..

muthstryker · 07-27-2010, 12:33 PM

See thats what I was thinking, I just replaced them but I know new parts can be faulty, I will have to check those out again. I wonder if the pinion angle can mess up U-joints..

Chlsnk · 07-27-2010, 02:23 PM

Definately sounds like a U joint.

tantrumpipeline · 07-27-2010, 02:29 PM

i rebuilt my rear end and didn't set the backlash correctly and has this happen, could be worth looking into.

muthstryker · 07-27-2010, 03:04 PM

Quote:

Originally Posted by tantrumpipeline

i rebuilt my rear end and didn't set the backlash correctly and has this happen, could be worth looking into.

NVM! I now know what backlash is...

Is this something an alignment shop can do? Kind of new to all of this setting stuff to the proper adjustments anyways..

muthstryker · 07-27-2010, 03:05 PM

I will check out my U-joints when I get home if they seem bad or something i will swap them out this weekend.

Ghastlyone · 07-27-2010, 03:09 PM

Another thing you might check, is that your drive line needs to be regreased at the yoke and transmission tail shaft.

I was getting a clunk on my Tahoe Limited and come to find out, this is what the problem was. Popped the driveline out, greased the crap out of it and it was fine after that.

07-27-2010, 11:01 AM	#1
muthstryker Registered User Join Date: Dec 2009 Location: Snohomish, Washington Posts: 1,187	Clunk coming from rear? Hey guys, took my truck out of the garage yesterday for a ride around the block real quick and when I brake, there is a loud clunk in the rear. I can feel it too. I cant figure it out... The truck will be alinged this friday and dont plan on driving it untill it is aligned but what could this be? Is it possible my pinion angle is off causing the drive shaft to clunk? Or?... The correct drop shocks for the rear are on the way do you think its maybe a shock thing and I should see what happens when I replace the stock shocks with the lowered shocks?

07-27-2010, 11:39 AM	#2
willett Another Day, Another Dollar Join Date: Nov 2008 Location: North Vancouver, BC Posts: 1,316	Re: Clunk coming from rear? sounds like u - joints to me.. __________________ -78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"

07-27-2010, 12:33 PM	#3
muthstryker Registered User Join Date: Dec 2009 Location: Snohomish, Washington Posts: 1,187	Re: Clunk coming from rear? See thats what I was thinking, I just replaced them but I know new parts can be faulty, I will have to check those out again. I wonder if the pinion angle can mess up U-joints..

07-27-2010, 02:23 PM	#4
Chlsnk Registered User Join Date: Jan 2009 Location: Kansas city Posts: 756	Re: Clunk coming from rear? Definately sounds like a U joint. __________________ *My 84 short bed build up*** http://67-72chevytrucks.com/vboard/s...68#post3481968

07-27-2010, 02:29 PM	#5
tantrumpipeline Master Procrastinator Join Date: Sep 2009 Location: Grande Prairie AB Canada Posts: 1,128	Re: Clunk coming from rear? i rebuilt my rear end and didn't set the backlash correctly and has this happen, could be worth looking into. __________________ My Buildhttp://67-72chevytrucks.com/vboard/s...d.php?t=395506 20 Duramax tow pig 68 2wd short stepper project 77 2wd short fleet beater 52 short project

07-27-2010, 03:05 PM	#7
muthstryker Registered User Join Date: Dec 2009 Location: Snohomish, Washington Posts: 1,187	Re: Clunk coming from rear? I will check out my U-joints when I get home if they seem bad or something i will swap them out this weekend.

07-27-2010, 03:09 PM	#8
Ghastlyone Registered User Join Date: May 2010 Location: Las Vegas Nevada Posts: 223	Re: Clunk coming from rear? Another thing you might check, is that your drive line needs to be regreased at the yoke and transmission tail shaft. I was getting a clunk on my Tahoe Limited and come to find out, this is what the problem was. Popped the driveline out, greased the crap out of it and it was fine after that.



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