Clunk Sound - Team Camaro Tech
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post #1 of 15 (permalink) Old Feb 25th, 01, 07:33 PM Thread Starter
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Question

When I put the Sub into drive or reverse I hear a clunk sound, is it the u-joints, I also think I hear it when letting off the gas peddle while on the highway.

Ron

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'89 Suburban/454tbi/2500/3:73;G80 rear/3 speed/1qt oil per 800 miles
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post #2 of 15 (permalink) Old Feb 25th, 01, 08:12 PM
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Better check those u-joints...its not pretty when one lets go on the highway

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375hp 78 Chevy truck
77 Chevy Nova
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post #3 of 15 (permalink) Old Feb 25th, 01, 10:54 PM
 
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where is the clunk sound comming from if i were to guess i would say u joint but i would also check rear end
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post #4 of 15 (permalink) Old Feb 26th, 01, 07:44 AM Thread Starter
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It sounds like it is coming from the middle of the suburban. Could it be the rear end?

Ron
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post #5 of 15 (permalink) Old Feb 26th, 01, 04:41 PM
 
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I WOULD GUESS A CRACKED FLY WHEEL, ESPECIALLY IF THE CLUNKING SOUND GETS LOUDER ONCE IT IS IN GEAR
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post #6 of 15 (permalink) Old Feb 26th, 01, 06:33 PM Thread Starter
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no clunking sound while driving only when I put it into drive or reverse or when I let of the gas while on the highway. The clunk sound only happens once per deal.

Ron

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'89 Suburban/454tbi/2500/3:73;G80 rear/3 speed/1qt oil per 800 miles
'95 Nissan xe-v6/extra cab/automatic
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post #7 of 15 (permalink) Old Feb 27th, 01, 06:06 PM
 
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i would guess bearings on the gears in the tranny i dont know though , dont know very much about trannys but my friends standard he cracked it spinning out in reverse and they said some thing tryed to jump out of transmission when he got it fixed (warrenty)thank god lol but i would guess it is some where in your tranny does your transmission leak any where, is it standard or automatic??o yeh when they fixed it they said his bearings were messed up cant really tell ya but good luck
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post #8 of 15 (permalink) Old Feb 27th, 01, 06:11 PM Thread Starter
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It is a automatic, the th400 I think with a 3 speed, they are supposed to be good. Also NO leaks thank god.

Ron

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'89 Suburban/454tbi/2500/3:73;G80 rear/3 speed/1qt oil per 800 miles
'95 Nissan xe-v6/extra cab/automatic
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post #9 of 15 (permalink) Old Feb 28th, 01, 05:44 AM
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check that loooong split driveshaft's center hanger bearing, it's probably worn out.

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post #10 of 15 (permalink) Old Feb 28th, 01, 11:27 AM
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Cool

Check the Transmission Mount on the vehicle.
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post #11 of 15 (permalink) Old Feb 28th, 01, 01:12 PM Thread Starter
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It sounds like it could be a few things

Ron

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'89 Suburban/454tbi/2500/3:73;G80 rear/3 speed/1qt oil per 800 miles
'95 Nissan xe-v6/extra cab/automatic
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post #12 of 15 (permalink) Old Mar 1st, 01, 01:33 AM
 
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Lightbulb

All of these answers could be what it is ,but my gta was doing the same thing ,it took me forever to find out what it was:It was the gas tank hold down staps were loose!BELIEVE IT OR NOT,CHECK IT OUT!
[
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post #13 of 15 (permalink) Old Mar 1st, 01, 06:08 AM Thread Starter
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Someone told me that, so I did they look ok.

Thanks,

Ron

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'89 Suburban/454tbi/2500/3:73;G80 rear/3 speed/1qt oil per 800 miles
'95 Nissan xe-v6/extra cab/automatic
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post #14 of 15 (permalink) Old Mar 1st, 01, 08:52 AM
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I would have to lean more to rear end than u joints if its a loud clunking sound .U joints going bad usually will vibrate too.
I have a crewcab dually just had to replace u-joints there was a slight but noticable
vibration and a "tink" sound occassionally
going from rev. to drive ....Mike
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post #15 of 15 (permalink) Old May 24th, 01, 11:27 AM Thread Starter
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Question

Thats the thing, the u-joints are new and it did it before the u-joints were replaced too. I got the suburban in 01-01 so all this work stated above was done from then to now. Could it be the gov. lock? or the limited-slip?
Footnote: I just looked and these posts are old. So time for an update. I had the rear end rebuilt (new ring and pinion/bearings) they said it didn't look bad at all. Replaced the shocks all 4 with gas charged shocks. Had the transmission fluid replaced, they said it looked good. All new u-joints, they also said they looked good too. Had the yoke lubbed up too. They replaced center support bearing also. What next??? Trans mount looks ok, think that?

Ron

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'89 Suburban/454tbi/2500/3:42;G80 rear(was factory 3:73;G80)/3 speed/4x2/180* Thermo stat/K&N Airfilter/1qt oil per 800 miles/Second owner
'95 Nissan xe-v6/extra cab/automatic/4x2/Original owner



[This message has been edited by River Bum (edited 05-24-2001).]
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