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Old March 26th, 2006, 04:31 PM   #1
Roadhouse
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Default 99 Suburban vibration and clunking

So a few weeks ago my wifes 99 Suburban 1500 4x4 started getting a bad vibration. It goes away at 75mph but it pretty bad from 30mph until then.

It has developed a drivetrain clunk after the vibration started. When shifting into reverse it clunks bad, also when shifting into drive from reverse it's bad. But doesn't do it if you just shift into drive from park.

I know these descriptions are vauge, but anyone have similar experience with a Chevy doing this? I'm taking it into a shop this week to see what the deal it,but was curious on some ideas before I take it in.

Truck is 1/2ton 5.7L Vortec, 4l60e, and Auto-trac push button tcase Nvg246?
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Old March 26th, 2006, 05:57 PM   #2
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U joints most likely.
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Old March 26th, 2006, 06:35 PM   #3
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Hi Mike
On the chevy trucks I've had. The clunk is usually the slip yoke from the rear drive shaft. Pull the shaft and clean and grease the splines. All will be good and it's easy to do.
Steve
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Old March 26th, 2006, 06:52 PM   #4
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I had a '91 burb that had a vibe kick in around 45mph. Ended up being the lock-up in the torque converter. New converter, no more vibe. But with a cluck, most likly U-joints.
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Old March 26th, 2006, 07:10 PM   #5
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My 99 Burban does the same thing, I thought it might be the tires....
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Old March 26th, 2006, 07:11 PM   #6
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Thanks guys.....u-joints is what I was thinking, but seems wierd it doesn't happend going from Park to Drive....but park to reverse, and reverse to drive.
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Old March 26th, 2006, 07:14 PM   #7
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Quote:
Originally Posted by biohazardbill
My 99 Burban does the same thing, I thought it might be the tires....
I am going to put new tires on it tomorrow as I know at least one of my tires lost a weight...and its time for new ones anyway.
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Old March 26th, 2006, 09:54 PM   #8
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Kim's blazer did tha as well and the ujoint was worn inside so bad, it had a 1/8" when centered between the tabs in the yoke. It would slide side to side when going from park to reverse. Then getting cocked to the one side and vibrate. Cheap GM joints, I put spicers in and no troubles.
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Old March 27th, 2006, 09:25 PM   #9
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verdict?
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Old March 28th, 2006, 03:28 PM   #10
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Got the work done today....both ujoints in the rear shaft where shot. Rusty as hell. I'm pretty sure they where still factory ones with 100k miles on them and six Michigan winters. New tires went on yesterday also, but dont think that helped with the vibration, but at least they should hold air.

Sad news is I got a few estimates for the body work I need done on the rear quarter panel. $950...ouch.

damage
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Old March 28th, 2006, 03:34 PM   #11
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I don't see any damage. I just see Chevy Tough!
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Old March 28th, 2006, 09:27 PM   #12
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I replaced my Ujoints today as well.... Vib gone
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Old March 28th, 2006, 09:35 PM   #13
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I replaced the rear u-joint in my 2002 Silverado today cause it had a vibration as well but no klunk when i took it apart the needles were rust and dust but the vibe is gone
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Old March 28th, 2006, 10:09 PM   #14
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Quote:
Originally Posted by deuce228
I don't see any damage. I just see Chevy Tough!

chevy tough with a smashed in quarter panel.
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Old March 29th, 2006, 12:12 AM   #15
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Quote:
Originally Posted by biohazardbill
verdict?
No more vibes/clucking
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Old March 29th, 2006, 02:05 PM   #16
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Quote:
Originally Posted by KILLER"B&quot View Post
No more vibes/clucking
Bill, I took the 'Burby to my buddies shop so it was easy to do on the hoist. He told me factory u-joints are better than any aftermarket ujoint. I told him thats not what KillerB says. He looks at me and says "Well Bill has to be right"
It was funny, I think Jerry has only met you once or twice and has been a mechanic for 20 years, but backed down on his word, 'cause he has faith in your knowledge.

Oh, and I did put in spicer greasable joints.
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Old March 29th, 2006, 09:22 PM   #17
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Quote:
Originally Posted by Roadhouse
Bill, I took the 'Burby to my buddies shop so it was easy to do on the hoist. He told me factory u-joints are better than any aftermarket ujoint. I told him thats not what KillerB says. He looks at me and says "Well Bill has to be right"
It was funny, I think Jerry has only met you once or twice and has been a mechanic for 20 years, but backed down on his word, 'cause he has faith in your knowledge.

Oh, and I did put in spicer greasable joints.
Good deal, that is funny.... I guess I will take it as a compliment
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Old April 19th, 2006, 09:57 AM   #18
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I've had the same problem for a while. Clanking in the front. No clue what the heck it is, check everything out, can't see anything that's been hitting (that i can see). Happens at really slow speeds stopping (either forward/reverse). Really starting to annoy me too.
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