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03-27-2013, 09:20 PM
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#1 |
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Registered User
Join Date: Nov 2012
Location: melbourne australia
Posts: 196
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86 SILVERADO what discs do I need?
The supplier cant tell which one I need to replace the worn front rotors on my truck.part no 5006 which are 11 7/8th
or 5032 which are 11 41/64. Truck is not here so can't measure. Also rear wheel cylinder either 2 inch or 2 3/4. Can any one help ? Vin:2gcec14h2g1170202 |
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03-28-2013, 08:07 AM
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#2 |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: 86 SILVERADO what discs do I need?
Yes -
Here is the brake system release chart for an '87 ('86 should be the same). Scan through there and see what you find.  Your truck would be the equivalent of an R10, and I believe you'll find front rotors are 11.86" (probably what they are calling 11 7/8 = 11.875). Additionally, you said "rear wheel cylinders" but your choices do not make sense. I think you meant the width of the rear brake shoes, which you will find to be 2.75". 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/ Last edited by Keith Seymore; 03-28-2013 at 08:14 AM. |
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03-28-2013, 10:01 AM
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#3 |
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Registered User
Join Date: Sep 2008
Location: Bailey, NC
Posts: 2,462
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Re: 86 SILVERADO what discs do I need?
Measure the thickness of the rotor. It will be 1" or 1.25". Then measure the depth of the drum. It will be 2" or 2.75".
Posted via Mobile Device
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Jeramy '84 GMC project truck '85 Chevy 4X4 SOLD '07 Chevy Trailblazer SS 5th Annual SHPHC Car/Truck Show Pics http://67-72chevytrucks.com/vboard/s...d.php?t=543605 UPDATED PICS! CHECK 'EM OUT |
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03-28-2013, 10:31 AM
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#4 | ||
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: 86 SILVERADO what discs do I need?
Quote:
Quote:
Can you see the chart? It's what we used in order to release the parts to production. K
__________________
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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03-28-2013, 12:21 PM
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#5 |
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Registered User
Join Date: Sep 2008
Location: Bailey, NC
Posts: 2,462
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Re: 86 SILVERADO what discs do I need?
Sorry Keith. I missed original info on the tiny phone screen.
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Jeramy '84 GMC project truck '85 Chevy 4X4 SOLD '07 Chevy Trailblazer SS 5th Annual SHPHC Car/Truck Show Pics http://67-72chevytrucks.com/vboard/s...d.php?t=543605 UPDATED PICS! CHECK 'EM OUT |
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03-28-2013, 12:30 PM
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#6 | |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: 86 SILVERADO what discs do I need?
Quote:
What do you wanna bet Ozkiwi is sleeping right now? He'll probably see this when he gets up in a few hours.... (lol) K
__________________
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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04-02-2013, 04:00 AM
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#7 |
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Registered User
Join Date: Nov 2012
Location: melbourne australia
Posts: 196
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Re: 86 SILVERADO what discs do I need?
The brake option is J55 is that the same as JB5 ?
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04-02-2013, 07:46 AM
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#8 |
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Registered User
Join Date: Sep 2008
Location: Bailey, NC
Posts: 2,462
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Re: 86 SILVERADO what discs do I need?
J55 brakes use the same rear shoes as JB5 / JD5 (11 5/32" x 2 3/4").
J55 indicates it has the HD brake system. I googled the GM RPO codes and found these pages. http://www.marshu.com/images-website...-car-codes.pdf
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Jeramy '84 GMC project truck '85 Chevy 4X4 SOLD '07 Chevy Trailblazer SS 5th Annual SHPHC Car/Truck Show Pics http://67-72chevytrucks.com/vboard/s...d.php?t=543605 UPDATED PICS! CHECK 'EM OUT |
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04-02-2013, 09:27 AM
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#9 | |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: 86 SILVERADO what discs do I need?
Quote:
K
__________________
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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04-02-2013, 09:29 AM
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#10 | |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: 86 SILVERADO what discs do I need?
Quote:
K
__________________
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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