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Clunk noise from rear end

Tiny
JJAMES1230
  • MEMBER
  • 1997 GMC SIERRA
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 282,000 MILES
I have a noise that the best way to describe is a "clunk". When it happens it feels like the rear end is trying to lock up, because it propels you forward in the cab a little. It started after I changed the oil in it. There is also an almost dragging chain sound while driving. Do not know if the two are related.
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Sunday, November 6th, 2016 AT 5:17 PM

5 Replies

Tiny
KOOLCADDY6
  • MECHANIC
  • 60 POSTS
You might want to see if it requires a limited slip additive.
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Sunday, November 6th, 2016 AT 5:36 PM
Tiny
JJAMES1230
  • MEMBER
  • 3 POSTS
I did that. Forgot to put that in with all the other information with my question.
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Monday, November 7th, 2016 AT 5:36 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
When you changed the oil did you see metal flakes in it? This could mean you have a bearing going out which will cause the differential to bind up and then release.

Please let us know

Best, Ken
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Saturday, November 12th, 2016 AT 12:42 PM
Tiny
JJAMES1230
  • MEMBER
  • 3 POSTS
There were no metal flakes in it that I saw. But it was quite low now that I think about it. It didn't start doing this until I changed the oil.
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Saturday, November 12th, 2016 AT 7:07 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
What kind of oil did you put back in it?
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Sunday, November 13th, 2016 AT 10:10 AM

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