Question about 2004 GMC Sierra 1500 Crew Cab

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Clunk noise from rear of truck

I, get a clunk noise everytime from a stop, coming from the rear of truck i dont get this noise from switching gears only from a stop, the brakes are all new.. the rear end fluid is ok, the trans.fluid is ok, could this still be a rear end problem, or something with the 4wd.? this is driving me crazy..

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  • Anonymous Mar 25, 2014

    loud noise few secs then stops

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I had a '91 Chevy Silverado with a similar problem. The noise was the drive shaft binding at the spline where it connects into the transmission. The shaft needs to slide freely and is unable to unless it is greased occasionally. Pull the drive shaft out from the transmission and grease the spline. This will quite it down immediately, if this is where your noise is coming from. It worked for me!

Posted on Dec 02, 2008

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How about the U joint? If it's shot, you will hear a clunk when u start up. You probably already know, but jack up the back of the truck (both wheels off the ground) make sure u blocked front wheels front and back so it can't roll, use jack stands so u don't get squished, truck in neutral, e- brake off, climb under, grab driveshaft and twist back and forth to see if there is slop or play in the rear universal joint. Let me know what u find. Good Luck, and don't get squished (or squashed). countrycurt0

Posted on Sep 30, 2008

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I have a 2004 silverado 1500 and have clunking in rear end and was told I have excessive back lash in ring and pinion gears how do I fix that and how much would it cost?


suggest that you talk with a diff reconditioning specialist center
if you have excessive pinion to ring gear clearance the diff will be making terrible noises not a clunk
what you have is worn side gear washers in the diff carrier and that is not essential to repair unless you get diff noise on turning corners
All diffs have play in the diffs that most people say is pinion /ring gear problems when it is not
the clunk noise comes from engaging a gear and the diff housing reacts to the load ( radius rod bushes , stabilizer bar bushes etc), the side gears take up the clearance, and the
"U " joints or cv joints take any wear
Best advice is--- if all you have is a clunk ( check everything outside the diff first) and the diff runs quiet under acceleration or deceleration, DON'T fix what ain't broken

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