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

 

All it takes is some stock-boy to drop it and its warped.

 

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?

 

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.

 

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.

 

are yall sure its not a bent axle..? because thats what it sounds like

 

Im thinking its either a bent rear axle or your rear thrust is off.

 

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

 

Buy a sticker!
Kim

 

I am glad you got it figured out. We have a RoadForce balancer at work and it is really nice for finding bad tires.