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06-14-2013, 11:39 AM
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#1 |
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Registered User
Join Date: Jun 2012
Location: St Augustine, florida
Posts: 147
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front brake rotors 82 gmc stepside
i went to purchase the brake rotors for my 82 stepside and they asked if I had 2 inch or 2 1/4 inch brakes can anyone tell me how I determine the difference so I get the correct ones for my truck?
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06-14-2013, 11:40 AM
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#2 |
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Registered User
Join Date: Jun 2011
Location: Baytown TX
Posts: 2,219
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Re: front brake rotors 82 gmc stepside
Your rotor thickness should be 1in or 1.25in thick.
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__________________
John 82 Chevy Silverado 350ci/TH350 
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06-14-2013, 12:00 PM
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#3 |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,245
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Re: front brake rotors 82 gmc stepside
J50 is the merchandised (customer selectable) RPO for power brakes; JB3 and JB5 are subsets (additional detail) based on that. JB3 is the small 1" rotor; JB5 is the 1.25" rotor.
Here is the brake system release chart (for a '74, and for an '87) for reference if you would like to review it for a bit more detail. K   
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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06-14-2013, 05:48 PM
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#4 |
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Registered User
Join Date: Aug 2009
Location: S.C.
Posts: 1,593
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Re: front brake rotors 82 gmc stepside
Measure the rotor thickness and have them match it, if the parts guy is willing.
2 or 2-1/4, I believe is the width of the rear shoes. They can use their computer to determine what you have by that.
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'86 C-30 dually, 454/tbh400 '73 K-20 350/350/205 (sold  )I'm kinda like duct tape- no real purpose, but handy to have around. |
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