Will missing pieces on a drum cause vibration?
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Tuned
Joined: Nov 2007
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From: Whitmore lake Mi
Will missing pieces on a drum cause vibration?
93 ford front disc rear drum. 4-6 inch pieces missing from the drums on the lip which goes over the backing plate. Would this cause vibration while driving but not applying the brake?
Jim
Jim
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Tuned
Joined: Nov 2007
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From: Whitmore lake Mi
Please elaborate. My daughter and I noticed a definite difference with the new drums. So did I just get lucky and put 2 out of balance tires on so they cancel each other out... possible but unlikely.
Thanks
Jim
Thanks
Jim
Last edited by jem44357; Mar 15, 2010 at 10:49 PM. Reason: correct a brain fart meant to say drums not rotors
Thread Starter
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Tuned
Joined: Nov 2007
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From: Whitmore lake Mi
The reason I posted is because a guy I work with stated as mark a. did "no". My co worker says it is to close to the center to have any marked effect. I do not believe this is true. In any case myself and my daughter noticed a difference. Bottom line is it is better and rides like a dream so I guess I really do not care about the physics just the results.
Jim
Jim
Post Fiend
Joined: Nov 2001
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From: Neenah, Wisconsin
Well he's partially right....the closer to center it is the less of an imbalance it will cause...but if its missing enough....yes it will cause a vibration.....if it didn't matter...they wouldn't balance rotors and drums to begin with...
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Tuned
Joined: Nov 2007
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From: Whitmore lake Mi
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Posting Guru
Joined: Jan 2005
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From: The Vieux Ford, Kansas
Yes it will I have experienced this first had when my brake lost about inch wide strip about 4 inches long in the same place yours did. I have no idea why it broke, just hit the brakes and heard a bag like throwing some gravel out of a tire but louder. It acted just like losing a wheel weight. It creates an imbalance if it spins it needs to be balanced.
-John
-John
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Post Fiend
Joined: Nov 2001
Posts: 7,698
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From: Neenah, Wisconsin
Well that outside lip that he's talking about is basically there to keep crap from building up in the drum......yes in the long run it could cause a problem but it doesn't actually affect the strength.....then again....if thats cracked....whats the condition of the rest of the drum
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Tuned
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From: Whitmore lake Mi
? like I knew it was that way and just kept driving it. I assumed the vibration was something else. I had the drive shaft rebalanced and also had the wheels rebalanced. Neither of these made a difference. When I found it I replaced both drums. No other damage was evident. I did notice today as I looked at them lying on the scrap pile one is missing the balance weight.
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Tuned
Joined: Nov 2007
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From: Whitmore lake Mi
Well I had been driving it after a few years of it being parked. As I was resurrecting it I decide to replace the life time shocks. during the replacement of the shocks was when I found the bad drums. I have since swapped the wheels with my daughters 92 and my baby rides like a dream. Must have had a bad wheel also. Now if that occasional rumbling noise on start up would just go away...
Jim
Jim
