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Old 11-15-2004, 01:10 PM   #1
88Jimmy4x4
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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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Old 11-15-2004, 02:18 PM   #2
ElGracho
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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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'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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Old 11-15-2004, 03:38 PM   #3
88Jimmy4x4
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Quote:
Originally Posted by ElGracho
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...
I will check the glovebox tonight, thanks
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Old 11-15-2004, 04:18 PM   #4
low 84
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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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Old 11-15-2004, 05:52 PM   #5
88Jimmy4x4
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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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Old 11-17-2004, 01:00 AM   #6
88Jimmy4x4
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Quote:
Originally Posted by ElGracho
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...
J50
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Old 11-17-2004, 01:13 AM   #7
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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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'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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Old 11-17-2004, 01:15 AM   #8
88Jimmy4x4
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Thanks alot for the info, I appreciate it :p
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