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Old 07-23-2014, 01:31 PM   #5
Keith Seymore
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Join Date: May 2009
Location: Motor City
Posts: 9,149
Re: Is this a JB5 rear brake drum?

Ah - I see.

Yes - you should be able to measure the width of the friction surface/shoes.

JB3 = 2"
JB5 = 2.75"

per the chart.

K
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