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Old 01-16-2017, 01:54 PM   #1
1970pelle
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Need a bit of brake booster ID help.

Yesterday I climbed in the 86 and hit the brakes after starting, and heard that wonderful sound of gush. I knew right then what it was, the booster had let go. Watched the vacuum gauge while touching the brakes, what vacuum none. I had started to notice a slight issue on take offs, a tip in hesitation. Now I know.

Anyway I looked at RockAuto and there asking me to look for a JB6 or JB7.
I have the sheet still in the glove box and I don't see this abbreviation code. Or even a mention of brakes on the list. The door sticker says nothing also. Could someone point me in the right direction please.

Thank you Ken 1986 C20 4X2 5.7L,700r4,3.43, Silverado
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2007 Lexus ES350 (wifes)
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Old 01-16-2017, 03:03 PM   #2
mongocanfly
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Re: Need a bit of brake booster ID help.

Scroll down to the "j" section and check for your gvw...maybe this will help..http://tlentz.oldsgmail.com/rpotext.txt
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Old 01-16-2017, 03:29 PM   #3
1970pelle
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Re: Need a bit of brake booster ID help.

Quote:
Originally Posted by mongocanfly View Post
Scroll down to the "j" section and check for your gvw...maybe this will help..http://tlentz.oldsgmail.com/rpotext.txt
A thousand thank you's. That was the tip I need to find the correct info. I have a JB6=6000-7000lbs

Ken
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1985 IROC Z28 190HP TPI 305,700r4,T-tops,rear trac lock, Black on lite gray, 16in Z28 wheels
2007 Lexus ES350 (wifes)
1984 CJ7 with 1995 HO4.0L MPI, 2 1/2 OME YJ Lift





“There is no limit to the amount of good you can do if you don't care who gets the credit.”
― Ronald Reagan
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Old 01-16-2017, 03:39 PM   #4
1970pelle
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Re: Need a bit of brake booster ID help.

One more question, what is the correct color for the booster on a 1986 C20 Silverado ? I ordered a AC Delco reman. from Rockauto. With shipping under 80 bucks if anyone is interested.

Thanks Ken
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1985 IROC Z28 190HP TPI 305,700r4,T-tops,rear trac lock, Black on lite gray, 16in Z28 wheels
2007 Lexus ES350 (wifes)
1984 CJ7 with 1995 HO4.0L MPI, 2 1/2 OME YJ Lift





“There is no limit to the amount of good you can do if you don't care who gets the credit.”
― Ronald Reagan
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Old 01-27-2017, 10:53 PM   #5
1970pelle
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Re: Need a bit of brake booster ID help.

Installed the new reman brake booster today. I order it from Rock Auto, and its a AC Delco unit. I sprayed it with matte gloss clear before installing. Only took about an hour total.
What a major difference in braking.

Ken
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1985 IROC Z28 190HP TPI 305,700r4,T-tops,rear trac lock, Black on lite gray, 16in Z28 wheels
2007 Lexus ES350 (wifes)
1984 CJ7 with 1995 HO4.0L MPI, 2 1/2 OME YJ Lift





“There is no limit to the amount of good you can do if you don't care who gets the credit.”
― Ronald Reagan
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