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Truck makes humming sound, volume increases with speed and turn

I drive a 1994 Ford Ranger, 4x4. For about 3 days now I have noticed a annoying humming sound that seems to come from my floor boards. It can be heard best with the windows all up. It gets louder when I turn right. I originally thought it was my tires so I had all four replaced and balanced. That didn't help. I believe now that it's my wheel bearings. I put it on a lift and checked each tire and this is what I found. -Both rear tires seem to be able to be pulled out or pushed in a little but neither rock up/down left/right. Spin fine. -Driver side front tire does not rock up/down left/right. Spins fine. After taking wheel off I could hear a very faint clicking noise coming from the hub area when I spun it. -Passenger side front tire does not rock up/down left/right. Squeaks rather loud when spun (has been squeaking for awhile before this problem) and seems to catch slightly on something every time it spins around. I have mechanics on base that are willing to do the repair but I need to know what the problem is and what parts I need to buy. Any help on what could be the problem/problems and ways that I can check for it would be of great help. Thanks.

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Wheel bearings is my guess. Confirm this by jacking the vehicle up with wheels on and check for play. Grab the tire by the top and bottom and wiggle it in and out, the will be excessive play. Given the fact that you gave a clear explination i am almost certain its bearings. You will need to purchace new bearings(Inner and Outer), Hub Seals, and possibly a possibly an axle seal kit for the 4x4 drive axle (they get old and stick to the axle durring disassembly) and keep in mind that to get the outter races of both bearings in the hub need to be "Pressed" out a a machine shop, or by any shop that might have a press.

Posted on Oct 07, 2009

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I would check the drive train ujoint`s driveline etc.

Posted on Oct 07, 2009

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