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11-15-2004, 01:10 PM
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#1 |
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Registered User
Join Date: Oct 2003
Location: houston, texas
Posts: 1,974
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Rear Drum Brake size needed
What size rear drum brakes do I have on my 85 chevy c10?
Im trying to buy a hardware kit and I need to know. 11" X 2" 11-5/32" x 2-3/4" 
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2008 Silverado Z71 RCSB 1991 GMC Jimmy 4x4 1976 GMC Sierra C15 SWB |
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11-15-2004, 02:18 PM
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#2 |
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Gentleman Jim Driver
Join Date: Nov 2002
Location: Poulsbo, WA
Posts: 1,551
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Which brake code is in the glove box? There will be one that is JB3 or JB5... Otherwise you could always measure.
Depending on how your truck was optioned it could be either...
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Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed |
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11-15-2004, 03:38 PM
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#3 | |
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Registered User
Join Date: Oct 2003
Location: houston, texas
Posts: 1,974
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Quote:
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2008 Silverado Z71 RCSB 1991 GMC Jimmy 4x4 1976 GMC Sierra C15 SWB |
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11-15-2004, 04:18 PM
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#4 |
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Registered User
Join Date: Jan 2002
Location: Houston, TX
Posts: 2,144
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just pull your drum off and measure the width of the brake shoe. it will either be 2" wide or 2-3/4" wide. i think most 1/2 ton 80's trucks have the 11x2
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'51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works '05 1500 Crew Cab RIP '84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker '80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's |
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11-15-2004, 05:52 PM
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#5 |
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Registered User
Join Date: Oct 2003
Location: houston, texas
Posts: 1,974
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I feel stupid because I could have done this saturday while I was rotating the tires but I didnt think of it until today
 I didnt think there would be a variation and I wanted to order my parts so I can have everything ready when I do the work without having to go back to the autoparts store.
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2008 Silverado Z71 RCSB 1991 GMC Jimmy 4x4 1976 GMC Sierra C15 SWB |
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11-17-2004, 01:00 AM
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#6 | |
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Registered User
Join Date: Oct 2003
Location: houston, texas
Posts: 1,974
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Quote:
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2008 Silverado Z71 RCSB 1991 GMC Jimmy 4x4 1976 GMC Sierra C15 SWB |
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11-17-2004, 01:13 AM
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#7 |
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Gentleman Jim Driver
Join Date: Nov 2002
Location: Poulsbo, WA
Posts: 1,551
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J50 is the code for power brakes. Based on it NOT saying J55 or JB5, you most likely have the smaller 11x2" brakes. When you're working on the fronts, you'll have the 1" rotors rather than 1.25"
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Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed |
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11-17-2004, 01:15 AM
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#8 |
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Registered User
Join Date: Oct 2003
Location: houston, texas
Posts: 1,974
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Thanks alot for the info, I appreciate it :p
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2008 Silverado Z71 RCSB 1991 GMC Jimmy 4x4 1976 GMC Sierra C15 SWB |
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