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08-27-2006, 08:40 AM
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#1 |
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Registered User
Join Date: Apr 2006
Location: southern Il
Posts: 335
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JB1 JB3 JB5 JD3 JD5 What is all this
I am putting a crossmember out of a 84 c-10 that had a 6.2 desiel into my 69 c-10 and I am wondering whick of these above codes would match up to the brakes
the brakes look kind of beefy and I can wait to see the difference in the discs vs the drums. |
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08-27-2006, 12:17 PM
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#2 |
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Registered User
Join Date: Apr 2006
Location: southern Il
Posts: 335
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Re: JB1 JB3 JB5 JD3 JD5 What is all this
nobody knows about the brake codes
come on! |
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08-27-2006, 12:33 PM
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#3 |
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Senior Member
Join Date: May 2004
Location: Caldwell,Tx.
Posts: 3,648
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Re: JB1 JB3 JB5 JD3 JD5 What is all this
Look here . Click the correct suffix and you should find what you are after. Frank
http://www.73-87.com/chevy_ids/rpomenu2.htm
__________________
Born and proudly residing in a Red State ! |
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07-09-2016, 02:43 PM
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#4 |
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Registered User
Join Date: Aug 2015
Location: Nova Scotia Canada
Posts: 145
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Re: JB1 JB3 JB5 JD3 JD5 What is all this
I have the same problem.
How do you figure out which booster to use? I am putting a 1984 cross member from a C10 into my 69. had no intention to change the rear drums yet. Any thoughts about JB3 vs JB5? JB3 BRAKE, POWER, DISC/DRUM, 4600 LBS JB5 BRAKE, POWER, DISC/DRUM, 6400 LBS
__________________
1968 GMC truck 910 Trim (Canadian) 127" WB 3 on the Three Trans (Saginaw SM330) 250 ci L6 Engine HEI ignition (early 80s L6) |
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07-12-2016, 09:08 AM
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#5 | |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: JB1 JB3 JB5 JD3 JD5 What is all this
Quote:
I'd just opt for the JB5 system. 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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07-12-2016, 11:38 AM
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#6 | |
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I'm just glad to be here!
Join Date: Jan 2008
Location: Longview, TX
Posts: 4,788
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Re: JB1 JB3 JB5 JD3 JD5 What is all this
Quote:
BTW JB3 is the 1" thick rotors JB5 is the 1.25" thick rotors
__________________
Karl  1965 Chevy Stepside(Grandpa's Old Blue) and (July 2015 Shop Build!)(2020, the Saga Continues) http://67-72chevytrucks.com/vboard/s...d.php?t=372424 The LST Challenge: http://67-72chevytrucks.com/vboard/s...=1#post7812257 Korbin's 1st Square: "Sunburn" http://67-72chevytrucks.com/vboard/s...d.php?t=418618 1985 GMC Sierra: "White Trash", Korbin's 2nd now... http://67-72chevytrucks.com/vboard/s...d.php?t=632305 Henry - 1984 Chevrolet, Owen's 1st Square |
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07-12-2016, 04:09 PM
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#7 | |
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Senior Member
 
Join Date: Jul 2000
Location: North Texas
Posts: 3,597
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Re: JB1 JB3 JB5 JD3 JD5 What is all this
Quote:
__________________
Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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07-11-2016, 11:23 AM
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#8 |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,977
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Re: JB1 JB3 JB5 JD3 JD5 What is all this
JB3 has a single diaphragm booster
JB5 has a dual diaphragm booster and slightly larger (wider or larger dia) brake shoes. http://67-72chevytrucks.com/vboard/s...d.php?t=203698
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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07-14-2016, 08:48 AM
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#9 |
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I'm just glad to be here!
Join Date: Jan 2008
Location: Longview, TX
Posts: 4,788
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Re: JB1 JB3 JB5 JD3 JD5 What is all this
learned something new. I have never seen the 4 digit RPO codes on the spids.
Nice to know that there is dummy character so that they are still the "normal" codes...
__________________
Karl 1965 Chevy Stepside(Grandpa's Old Blue) and (July 2015 Shop Build!)(2020, the Saga Continues) http://67-72chevytrucks.com/vboard/s...d.php?t=372424 The LST Challenge: http://67-72chevytrucks.com/vboard/s...=1#post7812257 Korbin's 1st Square: "Sunburn" http://67-72chevytrucks.com/vboard/s...d.php?t=418618 1985 GMC Sierra: "White Trash", Korbin's 2nd now... http://67-72chevytrucks.com/vboard/s...d.php?t=632305 Henry - 1984 Chevrolet, Owen's 1st Square |
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07-14-2016, 09:59 AM
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#10 |
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Registered User
Join Date: Feb 2009
Location: Cleveland,Ga
Posts: 42
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Re: JB1 JB3 JB5 JD3 JD5 What is all this
It was strange for me as well. I have always seen 3 digit codes. That's why I came to you guys.
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