Brakes ??
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Joined: Jul 2000
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Brakes ??
One more thing to consider. Check your rear axles. If one is bent it will cause the drum to orbit around slightly. This will give a symptom similar to warped drums. You can check this by jacking up both rear axles and placing a stationary object close to the axle center. Have someone rotate the opposite wheel while you compare the center of the axle with the stationary object. Even the slightest amount can be a problem.
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Brakes ??
Check your front pads to ensure they do not bind in the calipers. I just went through this recently on by F150. I killed two sets of rotors because the piston side pad backing plates were too large and were binding on the caliper rails. The first time warped the rotors within 2k miles after a brake job. I replaced the rotors, but didn't realize the pads were the cause. I was too cheap to replace the pads because they were the most expensive Bendix and they looked perfect. After another 15k miles the rotors warped again. A mechanic friend of mine turned the rotors and found the pad problem. The piston side pads were cocked in the calipers and the leading edges were completely worn out, while the trailing edges were as thick as new. I could'nt believe the pads could be so severely cocked in the calipers. We could see excessive flash where the backng plates were stamped poorly and bound in the caliper rails. So much for assuming Bendix means quality!
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Brakes ??
Update: Brakes are working perfectly. I wanted to thank everyone who posted a response, and not leave them hanging on the resolution of this problem. The problem was solved yesterday and found to be a "warped drum".
It seems that when I replaced the shoes and had the drums turned, the machine at the parts store did not cut the drums correctly. Possibly due to a bent shaft on the lathe. This was found by taking the drum back to the store, and another store to check it, while I was replacing the 2nd wheel cylinder. I replaced both drums with new and the problem persisted, but was better. I obtained the code for the RABS anti-lock brake system, which was 16 - System Operating Correctly (RABS II)
At this time I was sure the axle must be bent, or it was in the front. I had the truck in for new tires at Gateway Tire, and asked them to find the problem, which they did. Randy did a great job finding that one of the NEW drums was also warped. That one got me good, but the brakes are perfect now, and the tires ride good too.
Thanks again for all the great input, it really was very helpful.
Jim
It seems that when I replaced the shoes and had the drums turned, the machine at the parts store did not cut the drums correctly. Possibly due to a bent shaft on the lathe. This was found by taking the drum back to the store, and another store to check it, while I was replacing the 2nd wheel cylinder. I replaced both drums with new and the problem persisted, but was better. I obtained the code for the RABS anti-lock brake system, which was 16 - System Operating Correctly (RABS II)
At this time I was sure the axle must be bent, or it was in the front. I had the truck in for new tires at Gateway Tire, and asked them to find the problem, which they did. Randy did a great job finding that one of the NEW drums was also warped. That one got me good, but the brakes are perfect now, and the tires ride good too.
Thanks again for all the great input, it really was very helpful.
Jim
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