Out-of-balance rear drum - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 01-15-2009
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Out-of-balance rear drum

Has anyone ever encountered an unbalanced new brake drum before? I have checked the tires and wheels on my truck and still get a vibration at 58 mph! The brakes were done, spring shackles replaced (old ones were completely rusted away). Tires were balanced and now I have this vibration in the rear! What do I do now?
Thanks,
Kim
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Old 01-15-2009
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All it takes is some stock-boy to drop it and its warped.
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Old 01-15-2009
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ive never experienced that. are you sure it isn't at a specific rpm? say in another gear at the same rpm do you have the vibration? how were the tires checked? road force?
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Old 01-15-2009
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I have the same problem and wondered if it might be the drums. I looked into but couldn't really tell if anything was warped or not.
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Old 01-15-2009
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If the drums are warped they should only cause a vibration when applying the brakes. I would take the drum off and make sure there is not rust or anything in between the drum and the axle flange. Make sure it is seated correctly.
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Old 01-15-2009
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are yall sure its not a bent axle..? because thats what it sounds like
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Old 01-15-2009
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Im thinking its either a bent rear axle or your rear thrust is off.
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Old 01-15-2009
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Jason wins the kewpie-doll! I had another shop look at this and they took the drum off and found a chunk of rusted old brake drum between the new drum and the axle flange. They dressed everything up and it road-tested with no vibration! Then he checked the tires with the 'force machine'. It seems like like I might need new tires soon because one of them pulses a little. In any case, the brake drum was not seated properly and THAT was the cause.
Thanks for all of your suggestions - this site is the best
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Old 01-15-2009
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Buy a sticker!
Kim

Last edited by kimmer415; 01-15-2009 at 08:31 PM. Reason: sent twice
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Old 01-16-2009
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I am glad you got it figured out. We have a RoadForce balancer at work and it is really nice for finding bad tires.
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