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Originally Posted by astronot
Hi all,
Yesterday I replaced my rear drum brake shoes. I also replaced all of the springs and sprayed everything down good with brake cleaner. The drum didn't look too bad. I didn't have to do too much to get the drums off, just a few knocks with a mallet.
Today, I cannot drive over 55mph without experiencing extreme vibration. The vibration feels like an extreme unbalance somewhere, but I don't understand how something could have been affected that bad from the brake job I did.
Any ideas where to start troubleshooting?
Thanks!
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It sounds to me like the drums may be overheating. Did you have the drums turned down before putting the new shoes in? If the new shoes are too tight, they will overheat the drums and cause them to warp and vibrate.
Another possibility may be that the drums are not seated squarely on the axle hub. When you put the drum and wheel back onto the van, did you tighten the lugnuts in a cross pattern, or tighten them in a circle? If you used the circle tightening sequence, try taking the wheel and drum back off and put them back tightening the lugs with a cross pattern. If you have a torque wrench, make sure they are all the same tightness.