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2007 Holden Commodore Knock in rear

Tiny
MISTERWALKER
  • MEMBER
  • 2007 HOLDEN COMMODORE
  • 3.6L
  • V6
  • RWD
  • AUTOMATIC
  • 132,000 MILES
Have had this noise since purchasing the car approx. 2yrs ago. Dealer I bought it from says he couldn't hear it.
It's a rotating knock that is coming from the rear end. It's most noticeable when going down hill on over-run.
It's almost inaudible when in neutral, & can't hear it under acceleration. I've checked the drive shafts and uni joints and they appear to be sound. Also, it doesn't look like the drive shafts are hitting anything.
Is it possible that it could be the diff. Bearings?
It may be my imagination, but the noise seems to have got louder over that time.
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Thursday, June 11th, 2015 AT 11:30 PM

3 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
If you have not done so already go get a rear end alignment check done, these commodores with the IRS must be set up with a Jig if the rear end has been removed at any time, failing to do this can cause odd noises, rear tyre wear and a floating feeling from the rear end, this would be a good place to start looking for this problem.
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Friday, June 12th, 2015 AT 5:25 AM
Tiny
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  • 11 POSTS
Thankyou for that suggestion. I'll get it done and will let you know the outcome.
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Tuesday, June 16th, 2015 AT 6:14 PM
Tiny
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OK, hope there is no major problem.
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Wednesday, June 17th, 2015 AT 1:29 AM

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