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04-24-2007, 01:11 PM
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#1 |
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Registered User
Join Date: Apr 2007
Location: new mexico
Posts: 8
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need help determining GM codes for master cylinder
Hi folks,
Having a bit of a problem figuring out the correct master cylinder for the power brakes on the 77 c-10 4x2 short bed....was originally a 305 automatic with air,ps,pb... It's been "worked on" alot before we got it and we found a bunch of rigged up stuff so I don't even know if the master cylinder on it is the right one.... It has the heavy duty suspension... as it has the big shackle mounts and big springs on the back. it is a 5 lug.... When I try and look up the part I'm asked what the GM codes are on the "Service Parts Identification" sticker.; they ask if it is a JB1, JB3, JB5 I can't find it stamped anywhere...The glove box decal is gone... How can I find out... Thanks, Greg
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77 C10 Short Bed Step Side 4x2 454, T-400 hugger orange, 2.71 12 bolt limited slip 496 lb ft RWT at 1550 rpm’s. 71 Camaro roller cam 454 LS6 Tremec TKO 600 5 speed 2.56 gears, berlineta t-top, New Mexico plate "RAT454" 74 Monte Carlo 95 LT1 drive train swap, full computer, 03Dodge 5.9 Turbo Diesel Creedo:If it aint broke, it's breaking |
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04-24-2007, 01:50 PM
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#2 |
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Gentleman Jim Driver
Join Date: Nov 2002
Location: Poulsbo, WA
Posts: 1,553
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Re: need help determining GM codes for master cylinder
Are the front rotors 1" or 1.25" wide? If 1.25JB5, if 1" JB3.
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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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05-13-2007, 11:54 PM
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#3 | |
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Registered User
Join Date: Apr 2007
Location: new mexico
Posts: 8
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Re: need help determining GM codes for master cylinder
Quote:
They are the 1.25 inch...so that makes it a JB5.... Thank you for posting back. Greg
__________________
77 C10 Short Bed Step Side 4x2 454, T-400 hugger orange, 2.71 12 bolt limited slip 496 lb ft RWT at 1550 rpm’s. 71 Camaro roller cam 454 LS6 Tremec TKO 600 5 speed 2.56 gears, berlineta t-top, New Mexico plate "RAT454" 74 Monte Carlo 95 LT1 drive train swap, full computer, 03Dodge 5.9 Turbo Diesel Creedo:If it aint broke, it's breaking |
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