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Have a roaring noise appears to be coming from.

Tiny
SLM123
  • MEMBER
  • 1998 NISSAN FRONTIER
  • 16,000 MILES
Have a roaring noise appears to be coming from rear. I jacked truck up one side at a time and had the same noise. Could it be a bad differential bearing?
Monday, November 5th, 2012 AT 10:55 AM

5 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
It could be any of a number of bearings, most likely one of the wheel bearings but you can't find it that way. Spinning one wheel at a time engages the side gears in the differential which creates more noise that any bearing would. The noise will also be quite different without the weight of the truck on it.
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Monday, November 5th, 2012 AT 11:09 AM
Tiny
SLM123
  • MEMBER
  • 3 POSTS
Thank you-- I might be looking at a bad wheel bearing if not both.
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Monday, November 5th, 2012 AT 3:35 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Yes, but it could also be coming from the differential. You need a pro to listen to it.
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Monday, November 5th, 2012 AT 5:39 PM
Tiny
SLM123
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  • 3 POSTS
Thanks--It ended up being a bad front pinion gear bearing.
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Wednesday, November 7th, 2012 AT 7:29 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Yes, that is the possibility I was concerned about. A trained ear can tell the difference between that and a wheel bearing. Glad you found it.
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Wednesday, November 7th, 2012 AT 10:50 AM

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