Jim, I've asked the same question before. Once they get saturated with brake fluid or axle fluid they don't work right. Others have tried to clean them but they still tend to get "sticky" and cling to the drum. The only way to fix it is to replace. Perhaps someone will have a different perspective.

Kyle


1941 G506
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1946 3800
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1946 3600
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1924 Ford Model T Fordor