Who made brakes in 72? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

muddpile · 12-09-2005, 12:36 AM

Would my 72 chevy custom deluxe need a delco or bendix booster? I have looked all over the master cylinder and the proportioning valve and can see no trace of a name. The truck is not a power brake truck, but I want to add them, and the parts guy told me there were 2 different options. I understand I need a new rod/bracket or something too, but can't find anyone who sells those. Can anyone give me any information as to what I should order? Thanks!

Spoof · 12-09-2005, 12:47 AM

I have some spare supports or braces for you if you pay shipping. Only thing is I'm not sure if I have them for a 1/2 ton or 3/4? I guess you'll need a bracket, brace, maybe a different rod from the pedal...thats all I can think of from the top of my head.
This thread will help...
http://67-72chevytrucks.com/vboard/s...d.php?t=182300

srv8800 · 12-09-2005, 12:57 AM

you'll have to go to a junkyard for the brackets and push rod. i paid $20 for mine. my '72 had bendix brakes. it was on the prop. valve.

76bonanza · 12-09-2005, 11:24 AM

I dont think it matters which brand the both work the same I think. And fit the same. But some one chime in if I am misinformed.

Scrubby · 12-09-2005, 11:55 AM

I believe both were used in '72. My '72 blazer has delco though.

krue · 12-09-2005, 01:44 PM

Check the parts board, there are usually boosters for sale. Most of the time they will have the brackets and connecting rods.

**basketcase** · 12-09-2005, 01:46 PM

Yes. They both work and fit the same. Chevy used parts from both vendors. The only reason you need to know which is if you are replacing a MC or a booster seperately. You can't mix them. You need a Bendix with a Bendix ect. I have a Bendix with the Bendix logo stamped in the booster under the MC. Hard to see unless you take it off or can get your head down there. I have seen Delco-Moraine stamped in the same location. Originally one was painted black and one was gold tone. I'm not 100% which way it was so I won't say. I have not seen a marking on the MC but you can see a difference side by side. I think that the push rod depth is different which is the deciding factor.

You will need to get the power brake firewall mount and rod pivot assembly with the pedal rod from a donor truck. Not available aftermarket. It's easy to remove once you find one at a junkyard. It must be from a 1971-1972. !967-1970 are shorter mounts and the disc brake booster will not clear the firewall. I just converted my 1969 to discs but I avoided having to change the firewall mount by using a new '67-70 Bendix booster and a '72 Bendix MC. My truck had power drums originally.

You can get a booster/MC assembly in either Bendix or Delco from NAPA for about $135. Don't trust a used one with your life. If your prop valve is working ok now you can re-use it. They are available remanufacturered from most anywhere for $109. exchange with a core charge of up to $30. Since I didn't have one I bought a new one from CPP for $75. These are their manufactured parts and don't look exactly like original but fit and function the same. They come with the short hard lines, brake switch and wiring pigtail.

I'm not sure if your short hard lines from the MC to the proportioning valve are the same with std or p/b but they are available in all of the catalogs. Very hard to make with those short tight bends.

One more tip. Do not use a drum brake MC with discs. Those big single piston calipers require more fluid volume than a drum brake MC can move. Braking will really suffer in this case. I know this portion of my reply doesn't apply to you but someone else may be temped to try to save a little money. A proper booster/MC is a lot cheaper than new front sheet metal/grille/ bumper ect.

Tom

76bonanza · 12-09-2005, 03:16 PM

I am replacing my booster only, it says on the drivers side of booster delco moriane so I am replacing it with same even tho my truck is 1968 the PO must have swapped the whole setup out of a 71-72 when he upgraded to power brakes I hope it works out ok. Also I asked CPP they said they only sell one style booster for that year it will fit both master cylinders they said the rod depth difference is normaly between manual and power brake MC. So not sure but like they said if you buy the set it matters not.

krue · 12-09-2005, 04:02 PM

I haven't noticed any difference in booster brackets between the years, but then again I haven't really looked. The rods are very different between manual and power brakes and you don't have to worry about mixing them up.

76bonanza · 12-09-2005, 07:19 PM

Ok picked up my booster today it all looks ok exccept the one on the truck now is fatter depth wise not diameter could it be off a different year? Diameter is same looks like it will work ok it is just thiner? but it is a delco and so is my MC.

krue · 12-09-2005, 11:11 PM

It may be off a 3/4 ton, I've used both styles with the same m/c with no problems.

76bonanza · 12-09-2005, 11:17 PM

So I should be ok? will it brake worse with the thinner booster? Will the brake lines give enuf for the diff. size booster

Sonny · 12-09-2005, 11:25 PM

I think one is a single diaphgram and the other is dual. Can't remember which, but I seem to remember both will work. There was a thread or two discussing the difference between the boosters. I am sure someone will post the facts.

Sonny

Robert1970C20rstbukt · 12-09-2005, 11:35 PM

Your original booster was probably the single diapragm, so it was thinner. The bigger one is a dual diapragm, which gives you a lot more stopping power. My truck had the single and it went bad, so I changed it with a dual from a GMC 3500 and I noticed it was a lot easier to stop the truck, even with drums on the front.

muddpile · 12-10-2005, 12:42 AM

My truck was not a power brake truck, and I plan on buying a new booster from the parts store, and have no idea which one of the two brands to buy. If I posted up a picture of my master cylinder and prop valve, could someone tell me just by looking which brand it is?

krue · 12-10-2005, 02:06 AM

It doesn't matter which you buy. In fact I did a search on one of the parts store websites and all of the boosters in the late 60's (truck and car) had the exact same part no.

BTW the brake lines have enough give that you can just pull the m/c out far enough to bolt the booster on without disconnecting them. The only thing that isn't long enough is the wire for the brake light in the dash.

muddpile · 12-10-2005, 02:18 AM

So I can just order either one? Sweet! Which is the black one, or better yet, which one would be easier to find a bracket/rod for? I can always paint it black. Also, does anyone know why GM used two different suppliers? Seems like unnecessary complication on their part.

krue · 12-10-2005, 06:45 AM

http://www.partsamerica.com/ProductL...wer+Brake+Unit
according to partsamerica (advance auto, I use their site cuz they usually have pics) Bendix boosters are usually black, the gold ones are delco's.

Hope that helps.

**basketcase** · 12-10-2005, 07:47 AM

I'm not for sure on this but it may have had something to do with availability during a strike. It isn't unusual for GM and others to sorce from more than one vendor but it is a little odd that the parts were different. Usually they are made to the same specs.

76bonanza · 12-10-2005, 09:56 AM

Ok so I have a leaky booster from a 3/4 with dual diaphgram I have a single diaphgram booster to replace it will it make a big diff in braking? I like the way it brakes now?

krue · 12-10-2005, 09:08 PM

Quote:

Originally Posted by 76bonanza

Ok so I have a leaky booster from a 3/4 with dual diaphgram I have a single diaphgram booster to replace it will it make a big diff in braking? I like the way it brakes now?

I did the same thing and I noticed a little loss in braking, but nothing I couldn't live with.

76bonanza · 12-10-2005, 11:40 PM

Krue one last question is this a one man job? I think I understand the whole job but once I unbolt the MC will it support it self or will some one have to hold it is my question.

muddpile · 12-11-2005, 12:22 AM

Anyone have a spare bracket/connecting rod kicking around that would work for a 72? Last time I was at the wrecker, I never noticed any trucks that had em. I may have to check again though.

76bonanza · 12-11-2005, 12:57 AM

Krue just did the swap quick question the push rod on the booster I bought was not adjustable and was about 1-1/2 inch from face of booster way to long. Pulled the push rod out of the booster I removed was much smaller put it in the new booster slide right in now flush with face of booster like old one was put back together seems to work fine. Is this a bad thing using the old push rod with the new booster?

Thanks

krue · 12-11-2005, 01:19 AM

As long as it's adjusted right, I don't see a problem with using the old one.

12-09-2005, 12:36 AM	#1
muddpile Registered User Join Date: Dec 2004 Location: Saskatchewan, Canada Posts: 1,371	Who made brakes in 72? Would my 72 chevy custom deluxe need a delco or bendix booster? I have looked all over the master cylinder and the proportioning valve and can see no trace of a name. The truck is not a power brake truck, but I want to add them, and the parts guy told me there were 2 different options. I understand I need a new rod/bracket or something too, but can't find anyone who sells those. Can anyone give me any information as to what I should order? Thanks! __________________ 1964 Chevy Short Fleet: Tornado 1972 Chevy C10: Fast Orange Secondaries Wide Open

12-09-2005, 12:47 AM	#2
Spoof Registered User Join Date: Jul 2000 Location: Victoria,BC, Canada Posts: 1,300	Re: Who made brakes in 72? I have some spare supports or braces for you if you pay shipping. Only thing is I'm not sure if I have them for a 1/2 ton or 3/4? I guess you'll need a bracket, brace, maybe a different rod from the pedal...thats all I can think of from the top of my head. This thread will help... http://67-72chevytrucks.com/vboard/s...d.php?t=182300 __________________ 71 GMC 1500 LWB Last edited by Spoof; 12-09-2005 at 12:55 AM.

12-09-2005, 12:57 AM	#3
srv8800 Registered User Join Date: Oct 2005 Location: Texas Posts: 22	Re: Who made brakes in 72? you'll have to go to a junkyard for the brackets and push rod. i paid $20 for mine. my '72 had bendix brakes. it was on the prop. valve. __________________ '72 lwb pickup daily driver

12-09-2005, 11:24 AM	#4
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: Who made brakes in 72? I dont think it matters which brand the both work the same I think. And fit the same. But some one chime in if I am misinformed. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-09-2005, 11:55 AM	#5
Scrubby Check out GMTrucks.org Join Date: Sep 2003 Location: Boise, Id Posts: 284	Re: Who made brakes in 72? I believe both were used in '72. My '72 blazer has delco though.

12-09-2005, 01:44 PM	#6
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: Who made brakes in 72? Check the parts board, there are usually boosters for sale. Most of the time they will have the brackets and connecting rods. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" Last edited by krue; 12-09-2005 at 01:45 PM.

12-09-2005, 01:46 PM	#7
basketcase Senior Member Join Date: Oct 2001 Location: Edgerton OH USA Posts: 632	Re: Who made brakes in 72? Yes. They both work and fit the same. Chevy used parts from both vendors. The only reason you need to know which is if you are replacing a MC or a booster seperately. You can't mix them. You need a Bendix with a Bendix ect. I have a Bendix with the Bendix logo stamped in the booster under the MC. Hard to see unless you take it off or can get your head down there. I have seen Delco-Moraine stamped in the same location. Originally one was painted black and one was gold tone. I'm not 100% which way it was so I won't say. I have not seen a marking on the MC but you can see a difference side by side. I think that the push rod depth is different which is the deciding factor. You will need to get the power brake firewall mount and rod pivot assembly with the pedal rod from a donor truck. Not available aftermarket. It's easy to remove once you find one at a junkyard. *It must be from a 1971-1972. !967-1970 are shorter mounts and the disc brake booster will not clear the firewall.* I just converted my 1969 to discs but I avoided having to change the firewall mount by using a new '67-70 Bendix booster and a '72 Bendix MC. My truck had power drums originally. You can get a booster/MC assembly in either Bendix or Delco from NAPA for about $135. Don't trust a used one with your life. If your prop valve is working ok now you can re-use it. They are available remanufacturered from most anywhere for $109. exchange with a core charge of up to $30. Since I didn't have one I bought a new one from CPP for $75. These are their manufactured parts and don't look exactly like original but fit and function the same. They come with the short hard lines, brake switch and wiring pigtail. I'm not sure if your short hard lines from the MC to the proportioning valve are the same with std or p/b but they are available in all of the catalogs. Very hard to make with those short tight bends. One more tip. Do not use a drum brake MC with discs. Those big single piston calipers require more fluid volume than a drum brake MC can move. Braking will really suffer in this case. I know this portion of my reply doesn't apply to you but someone else may be temped to try to save a little money. A proper booster/MC is a lot cheaper than new front sheet metal/grille/ bumper ect. Tom __________________ '69 swb stepside in progress. '59 Corvette lifetime project Last edited by basketcase; 12-09-2005 at 01:51 PM.

12-09-2005, 03:16 PM	#8
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: Who made brakes in 72? I am replacing my booster only, it says on the drivers side of booster delco moriane so I am replacing it with same even tho my truck is 1968 the PO must have swapped the whole setup out of a 71-72 when he upgraded to power brakes I hope it works out ok. Also I asked CPP they said they only sell one style booster for that year it will fit both master cylinders they said the rod depth difference is normaly between manual and power brake MC. So not sure but like they said if you buy the set it matters not. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO Last edited by 76bonanza; 12-09-2005 at 03:21 PM.

12-09-2005, 04:02 PM	#9
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: Who made brakes in 72? I haven't noticed any difference in booster brackets between the years, but then again I haven't really looked. The rods are very different between manual and power brakes and you don't have to worry about mixing them up. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

12-09-2005, 07:19 PM	#10
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: Who made brakes in 72? Ok picked up my booster today it all looks ok exccept the one on the truck now is fatter depth wise not diameter could it be off a different year? Diameter is same looks like it will work ok it is just thiner? but it is a delco and so is my MC. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-09-2005, 11:11 PM	#11
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: Who made brakes in 72? It may be off a 3/4 ton, I've used both styles with the same m/c with no problems. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

12-09-2005, 11:17 PM	#12
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: Who made brakes in 72? So I should be ok? will it brake worse with the thinner booster? Will the brake lines give enuf for the diff. size booster __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO Last edited by 76bonanza; 12-09-2005 at 11:18 PM.

12-09-2005, 11:25 PM	#13
Sonny Active Member Join Date: Jan 2004 Location: Centerville, GA Posts: 240	Re: Who made brakes in 72? I think one is a single diaphgram and the other is dual. Can't remember which, but I seem to remember both will work. There was a thread or two discussing the difference between the boosters. I am sure someone will post the facts. Sonny

12-09-2005, 11:35 PM	#14
Robert1970C20rstbukt Registered User Join Date: Jun 2004 Location: Beeville, Texas Posts: 1,943	Re: Who made brakes in 72? Your original booster was probably the single diapragm, so it was thinner. The bigger one is a dual diapragm, which gives you a lot more stopping power. My truck had the single and it went bad, so I changed it with a dual from a GMC 3500 and I noticed it was a lot easier to stop the truck, even with drums on the front. __________________ RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck

12-10-2005, 12:42 AM	#15
muddpile Registered User Join Date: Dec 2004 Location: Saskatchewan, Canada Posts: 1,371	Re: Who made brakes in 72? My truck was not a power brake truck, and I plan on buying a new booster from the parts store, and have no idea which one of the two brands to buy. If I posted up a picture of my master cylinder and prop valve, could someone tell me just by looking which brand it is? __________________ 1964 Chevy Short Fleet: Tornado 1972 Chevy C10: Fast Orange Secondaries Wide Open



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12-10-2005, 02:06 AM	#16
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: Who made brakes in 72? It doesn't matter which you buy. In fact I did a search on one of the parts store websites and all of the boosters in the late 60's (truck and car) had the exact same part no. BTW the brake lines have enough give that you can just pull the m/c out far enough to bolt the booster on without disconnecting them. The only thing that isn't long enough is the wire for the brake light in the dash. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

12-10-2005, 02:18 AM	#17
muddpile Registered User Join Date: Dec 2004 Location: Saskatchewan, Canada Posts: 1,371	Re: Who made brakes in 72? So I can just order either one? Sweet! Which is the black one, or better yet, which one would be easier to find a bracket/rod for? I can always paint it black. Also, does anyone know why GM used two different suppliers? Seems like unnecessary complication on their part. __________________ 1964 Chevy Short Fleet: Tornado 1972 Chevy C10: Fast Orange Secondaries Wide Open

12-10-2005, 06:45 AM	#18
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: Who made brakes in 72? http://www.partsamerica.com/ProductL...wer+Brake+Unit according to partsamerica (advance auto, I use their site cuz they usually have pics) Bendix boosters are usually black, the gold ones are delco's. Hope that helps. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" Last edited by krue; 12-10-2005 at 06:45 AM.

12-10-2005, 07:47 AM	#19
basketcase Senior Member Join Date: Oct 2001 Location: Edgerton OH USA Posts: 632	Re: Who made brakes in 72? I'm not for sure on this but it may have had something to do with availability during a strike. It isn't unusual for GM and others to sorce from more than one vendor but it is a little odd that the parts were different. Usually they are made to the same specs. __________________ '69 swb stepside in progress. '59 Corvette lifetime project

12-10-2005, 09:56 AM	#20
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: Who made brakes in 72? Ok so I have a leaky booster from a 3/4 with dual diaphgram I have a single diaphgram booster to replace it will it make a big diff in braking? I like the way it brakes now? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-10-2005, 11:40 PM	#22
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: Who made brakes in 72? Krue one last question is this a one man job? I think I understand the whole job but once I unbolt the MC will it support it self or will some one have to hold it is my question. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-11-2005, 12:22 AM	#23
muddpile Registered User Join Date: Dec 2004 Location: Saskatchewan, Canada Posts: 1,371	Re: Who made brakes in 72? Anyone have a spare bracket/connecting rod kicking around that would work for a 72? Last time I was at the wrecker, I never noticed any trucks that had em. I may have to check again though. __________________ 1964 Chevy Short Fleet: Tornado 1972 Chevy C10: Fast Orange Secondaries Wide Open

12-11-2005, 12:57 AM	#24
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: Who made brakes in 72? Krue just did the swap quick question the push rod on the booster I bought was not adjustable and was about 1-1/2 inch from face of booster way to long. Pulled the push rod out of the booster I removed was much smaller put it in the new booster slide right in now flush with face of booster like old one was put back together seems to work fine. Is this a bad thing using the old push rod with the new booster? Thanks __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-11-2005, 01:19 AM	#25
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: Who made brakes in 72? As long as it's adjusted right, I don't see a problem with using the old one. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

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