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#1 |
Registered User
Join Date: Dec 2008
Location: Braggs, Ok
Posts: 3
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1978 c30 with bendix calipers, and vacuum booster
heres the deal, I have a 1978 c30, with a standard vacuum booster, bendix calipers on the front, no mention of the jb8 rpo in the glove box, I have heard that the bendix calipers were only on hydroboost
the brakes worked fine overall, master cylinder was leaking, replaced it, went to place the calipers, saw they were the bendix type, made me wonder if someone removed the hydroboost and put a vacuum booster on it |
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#2 |
Happy to be here
![]() Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,023
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Re: 1978 c30 with bendix calipers, and vacuum booster
Anyone?
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Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra" |
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#3 |
Registered User
Join Date: Dec 2006
Location: Victorville, CA
Posts: 68
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Re: 1978 c30 with bendix calipers, and vacuum booster
Have a '86 GMC 1-ton and it surely does have hydro-boost & bendix calipers.... someone correct me if I'm wrong but as I recall when I re-did my brakes that some time in the '80's was when hydro-boost first came out on pickups.
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#4 | |
huh ???
Join Date: Nov 2002
Location: Fredericksburg,Va.
Posts: 3,369
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Re: 1978 c30 with bendix calipers, and vacuum booster
Quote:
Chuck
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90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!" |
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#5 |
Registered User
Join Date: Dec 2006
Location: Victorville, CA
Posts: 68
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Re: 1978 c30 with bendix calipers, and vacuum booster
Well shut my mouth! Thanks for that Chuck, I stand corrected... maybe I shoulda' looked that up in The Books...
Happy New Year to all!
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#6 | |
Registered User
Join Date: Oct 2008
Location: Lenoir,NC
Posts: 159
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Re: 1978 c30 with bendix calipers, and vacuum booster
Quote:
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#7 | |
Registered User
Join Date: Dec 2006
Location: Victorville, CA
Posts: 68
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Re: 1978 c30 with bendix calipers, and vacuum booster
Quote:
You didn't mention, but does the truck have power steering? I suppose it does because it's a one-ton... do your pwr strng hoses look all hacked-up, like somebody plugged 'em or? Reason I ask is because hydro-boost runs the power steering AND the brakes. I suggest looking on AutoZone's website 'cause they have a fairly good repair section and if you also search your model/year that may give you your answer. IMHO, if your brakes are working normal I'd say you've got the stock setup for your model/year.. Otherwise, if you think you need to change it all over to hydro-boost you'll also have to get a different master cyl, maybe brake pedal-pushrod, power steering hoses and Lord knows what else. And if you go that route, whatever you do don't get yourself one of those cheap remanufactured hyd-boosts cause I've been there and done that.... twice! ACDelco makes 'em and they cost about $200, but darn well worth it... good luck Dave
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