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Brake drum size

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FordFisherman

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Discussion Starter · #1 ·
Any way to determine what size brakes/ drums without pulling the drums? 3.55 axle code 39. Not sure if the shoes are 3 or 3.5". Any help appreciated.
 
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DaveBey

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#2 ·
I'm pretty sure the 3" drums are for SRW trucks and the 3.5" drums are for DRW trucks.

Cheers from Claremore, OK! :)
Dave
 
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FordFisherman
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