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Brake drum size

802 Views 2 Replies 2 Participants Last post by  FordFisherman
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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I'm pretty sure the 3" drums are for SRW trucks and the 3.5" drums are for DRW trucks.

Cheers from Claremore, OK! :)
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