Bendix brake booster not working with factory brackets? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mark Hanna · 08-13-2010, 07:14 PM

I bought a Bendix remanufactured brake booster from Autozone and when I went to put it on my 72 C10, I noticed a problem. I should first clarify that the brackets I am using came from a 69 GMC 3/4 ton truck. I thought that they would be the same as the ones that should be on the 72, but when I put the brackets on the booster and connecting the pedal linkage rod, I found that the linkage sticks out about an inch and a half further than the surface of the bracketd that mount to the firewall. are the brackets different? Do I somehow have the wrong booster?

Here is a link to a picture of the booster i bought

http://www.bobschevytrucks.com/1967-...re-charge.html

PanelDeland · 08-13-2010, 08:59 PM

There are two different brands of booster.I don't remember the other brand name.IIRC the brackets are different.I think one brand is one 1/2 ton and the other on 3/4 but I don't know the particulars well enough to tell you what's what.
One of the BB vendors should be able to get you pointed in the right direction.

rsavage · 08-13-2010, 09:05 PM

There are at least 2 different kinds of firewall booster brackets used. One set is shorter than the other and, if I remember correctly, works with the fatter smaller diameter dual diaphragm booster while the longer set works with the single diaphragm larger diameter booster. If you have a single diaphragm, take it back and see if the dual works with your bracket.

srea76 · 08-13-2010, 09:10 PM

one booster is bendix and the other is delco moraine

rsavage · 08-13-2010, 10:17 PM

There are after market brands of the boosters too. It is the type that determines what brackets will work - single or double diaphragm. Autozone lists the dual as part number 54-71011 as an example for a 69 C20 and the larger single as part number 54-73709 for a 69 c10. Both are manufactured by "cardone" and are listed as bendix type. Take a look at the autozone site. If you have 69 c20 brackets then my guess is that you will need the 54-71011.

swierker · 08-13-2010, 11:09 PM

There is a thread in the FAQ section that shows the different versions of brake booster and MC's that our trucks have. You should check it out, it has some good info.

http://67-72chevytrucks.com/vboard/s...d.php?t=214559

08-13-2010, 07:14 PM	#1
Mark Hanna Registered User Join Date: Feb 2008 Location: Markleville,IN Posts: 14	Bendix brake booster not working with factory brackets? I bought a Bendix remanufactured brake booster from Autozone and when I went to put it on my 72 C10, I noticed a problem. I should first clarify that the brackets I am using came from a 69 GMC 3/4 ton truck. I thought that they would be the same as the ones that should be on the 72, but when I put the brackets on the booster and connecting the pedal linkage rod, I found that the linkage sticks out about an inch and a half further than the surface of the bracketd that mount to the firewall. are the brackets different? Do I somehow have the wrong booster? Here is a link to a picture of the booster i bought http://www.bobschevytrucks.com/1967-...re-charge.html

08-13-2010, 08:59 PM	#2
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: Bendix brake booster not working with factory brackets? There are two different brands of booster.I don't remember the other brand name.IIRC the brackets are different.I think one brand is one 1/2 ton and the other on 3/4 but I don't know the particulars well enough to tell you what's what. One of the BB vendors should be able to get you pointed in the right direction. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

08-13-2010, 09:05 PM	#3
rsavage Registered User Join Date: Aug 2009 Location: Alden NY Posts: 2,705	Re: Bendix brake booster not working with factory brackets? There are at least 2 different kinds of firewall booster brackets used. One set is shorter than the other and, if I remember correctly, works with the fatter smaller diameter dual diaphragm booster while the longer set works with the single diaphragm larger diameter booster. If you have a single diaphragm, take it back and see if the dual works with your bracket. __________________ 1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7

08-13-2010, 09:10 PM	#4
srea76 Registered User Join Date: Nov 2009 Location: Hazlehurst, Ga. Posts: 822	Re: Bendix brake booster not working with factory brackets? one booster is bendix and the other is delco moraine __________________ 1972 Custom Deluxe LT1 Gen V Swap "Green Lantern" 1984 Silverado Red Baron-72 c10 Project

08-13-2010, 10:17 PM	#5
rsavage Registered User Join Date: Aug 2009 Location: Alden NY Posts: 2,705	Re: Bendix brake booster not working with factory brackets? There are after market brands of the boosters too. It is the type that determines what brackets will work - single or double diaphragm. Autozone lists the dual as part number 54-71011 as an example for a 69 C20 and the larger single as part number 54-73709 for a 69 c10. Both are manufactured by "cardone" and are listed as bendix type. Take a look at the autozone site. If you have 69 c20 brackets then my guess is that you will need the 54-71011. __________________ 1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7

08-13-2010, 11:09 PM	#6
swierker Registered User Join Date: May 2010 Location: Wallingford, PA Posts: 186	Re: Bendix brake booster not working with factory brackets? There is a thread in the FAQ section that shows the different versions of brake booster and MC's that our trucks have. You should check it out, it has some good info. http://67-72chevytrucks.com/vboard/s...d.php?t=214559 __________________ 1970 Chevy LWB - 305/350 In Progress: 4/6 ECE drop, front discs, power brakes, Coys C5's. Last edited by swierker; 08-13-2010 at 11:11 PM. Reason: Added the Linky.



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