Mechanics

NISSAN FRONTIER NOISE PROBLEM

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?
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Slm123
November 5, 2012.




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.

Wrenchtech
Nov 5, 2012.
Thank you-- I might be looking at a bad wheel bearing if not both.

Tiny
Slm123
Nov 5, 2012.
Yes, but it could also be coming from the differential. You need a pro to listen to it.
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Wrenchtech
Nov 5, 2012.
Thanks--It ended up being a bad front pinion gear bearing.

Tiny
Slm123
Nov 7, 2012.
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.

Wrenchtech
Nov 7, 2012.

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