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Old 10-16-2008, 08:28 AM
red65mustang red65mustang is offline
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not enough shoe surface area square inches is contacting the drum....
most common cause (?) is when drums have been turned/ground to the max diameter allowed and new shoes are installed = very small friction contact patch due to the two different "arcs" (drum versus shoe)

changing to "electric" won't likely fix that....

take your drums to a tires/brakes store and have the id measured, max allowed is stamped into the casting....
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