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Center Support or Rear Wheel bearing noise 900

posted by  rwvolvo on  Thu Jan 28 08:50 CST 2010
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last visit: Sat Sep 20 19:39 CST 2014
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Our 940 wagon with 113000mi has developed quite a whine from either the rear end or the center support bearing. Is is true that if the car is shifted into neutral while at speed the center bearing would no longer be spinning and the noise, if it is the center support bearing, would also fade or at least change? When I do this the whine continues so my bet is the rear wheel bearings or differential. Is there any good method to determine wheel bearing noise vs. the differential? I hope wheel bearings because I don't have the time or patience left to mess with changing the rear axle.








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    Center Support or Rear Wheel bearing noise 900

    posted by  rstarkie on  Thu Jan 28 09:25 CST 2010
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    last visit: Fri Oct 24 10:14 CST 2014
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    Even in neutral and coasting the driveshaft will revolve in relation to the speed of the vehicle.

    My money is on the center support bearing causing the noise. Cold weather can bring out the worst in them.

    Randy








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      Center Support or Rear Wheel bearing noise 900

      posted by  RobCooper on  Thu Jan 28 13:05 CST 2010
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      go under the car and spray some lubspray into the support bearing (from front and back). Get a spray that shorts straight and long. If it quites up, then you know. Could get some life out of it

      replacing is a bitch but maybe easy for someone else. The FAQ link has how to..

      Rob







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