Question about 2005 Lincoln Aviator

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98 lincoln Navigator -- when slow turning sounds like tires are rolling over rumble strips on road. Also roar at 65 mph. Have replaced all four wheel bearings. No change. Suspect bad bearings in differential/pinion. Would this be an in-vehicle repair? Hard to do? Thanks

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  • geraldrowell Aug 24, 2010

    This car is not a 4wd and it is not a 2005 Lincoln Aviator, It is a 2wd 1998 Lincoln Navigator and it is not a tire problem. I have checked them, The 65 mph roar sounds more like a rear end roar and not a tire roar. My basic question still is how difficult are the differential/pinion bearings to change. The car has 160 k miles on it.

    Thanks

  • geraldrowell Aug 26, 2010

    I asked the same question 3 times i.e. how to access the differential to get to the bearings-never got an answer. I`m just wasting your time and mine. Thanks anyway

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  • Lincoln Master
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If you have checked the bearings of the wheels ,prior to replacing does it fit well into the hub.
Did you try to rotate the individual wheels to check for noise .?
If not try this out.to confirm if there is any rubbing of the wheel assembly, the brakes pads.
Now How re the ccondittion of the tyres, some tyres havea very badd uneven rolling after a wear off. So if the noise is heard as a bearing sound , I think you must try to change the wheels, swap with the same model for a trial.. It must be done to clear our doubts and more so because you had suspected the wheel bearings as the noise resemble.
One the above has been confirmed wee can move on to the drive, the bearings on the shafts, the universal joints and the differential.
These can be checked from the outside ,the shaft, universal joints by an underside inspection. The differential and crown/pinion noise can be checked by jacking up the car and feeling the rotation for rough ness. Make sure the oils were changed or else use a slighly higher grade and see if the noise had lessened. If so the crown/pinion must be opened and checked. This might be difficult to be done at home because some assistance is required but it is for you to decide on the resources available to you.
I hope you decide with these tips.

Posted on Aug 25, 2010

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  • Lincoln Master
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Is this 4 wheel drive? if it is then have the 4X4 transfer case checked, if the fluid has never been changed do that, worn out fluid will cause these type of symptoms, as for the rumble that could be tires, but the best thing to do is have a tire sales shop test drive it and do a courtesy front end check, that is most times a free inspection, whether u do the suggested work is then up to u.

Posted on Aug 24, 2010

  • yadayada
    yadayada Aug 24, 2010

    Please include all information in your problem posts, it makes things easier for both of us, this sounds like u have a defective differential pinion bearing, gear carrier bearing or wheel bearing, have it put on a lift and the wheel turned at speed, then the technician can listen for the noise and pin point the exact source with a mechanics Stethoscope. Thanks for using the best car question site in the world, Fixya.com

  • geraldrowell Aug 25, 2010

    Thanks for the reply, My basic question was and still is how to access the bearings inside the differential. Do I have to remove the axle assembly out from under the car or can I pull out the "chunk" from the rear after pulling out both axles and get to the pinion bearings. I`ve been passed the diagnostic state for some time now. As I stated I just replaced the wheel bearings so the problem is with the carrier bearings, which is easy to get to, or the pinion bearings which is not easy to get to. How do I access the pinion bearings?

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