Interchangeable brake booster? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

71Farmtruck · 11-03-2008, 09:47 PM

I wanted to know if you can swap the two different common types of brake boosters on 81-82 trucks, I have the shorter width, larger diameter booster on my truck, which has gone bad, and a good larger width smaller diameter booster on hand. Anybody know of any differences that would make them non-interchangeable?

71Farmtruck · 11-04-2008, 09:13 AM

Bump again, anyone have any input on the different boosters?

**Captkaos** · 11-04-2008, 05:28 PM

The 2 types are HD (dual diapram) and non HD. If I remember correctly the rod is different lengths.

71Farmtruck · 11-05-2008, 12:46 AM

Well, I was wrong on the diameter, they are both the same. The good other one is thicker, I'll bet its the dual diaphragm. It came off a suburban. I lined them up side by side and there was no noticeable difference in rod length in this instance. I tore it all down and removed the old one, I have the new one loosely on there, we'll see how it all runs when everything is tightened up.

**Captkaos** · 11-05-2008, 05:01 PM

All the burbs I have ever worked on or took apart had HD boosters, did you swap rods from one to the other or use what was on the booster?

71Farmtruck · 11-07-2008, 10:23 AM

It swapped over fine, I used the burb's rod, bolted in like it belonged there. I am still unable to make this turd idle, keeps dying out.

71Farmtruck · 11-07-2008, 03:29 PM

Figured it out, it is flooding.

Pyrotechnic · 11-07-2008, 03:51 PM

That's weird. One time I had a truck with the light duty boost and put the HD booster on it. Used the same rod and it worked just fine.

71Farmtruck · 11-07-2008, 10:42 PM

That was the case with mine, bolted up fine.

11-03-2008, 09:47 PM	#1
71Farmtruck Junk Junkie Join Date: Oct 2007 Location: Humble, TX Posts: 123	Interchangeable brake booster? I wanted to know if you can swap the two different common types of brake boosters on 81-82 trucks, I have the shorter width, larger diameter booster on my truck, which has gone bad, and a good larger width smaller diameter booster on hand. Anybody know of any differences that would make them non-interchangeable? __________________ Mike 71 Chevrolet C-10 Short Bed Stepside 81 GMC 1500 Sierra Classic Long Bed Last edited by 71Farmtruck; 11-03-2008 at 09:48 PM.

11-04-2008, 09:13 AM	#2
71Farmtruck Junk Junkie Join Date: Oct 2007 Location: Humble, TX Posts: 123	Re: Interchangeable brake booster? Bump again, anyone have any input on the different boosters? __________________ Mike 71 Chevrolet C-10 Short Bed Stepside 81 GMC 1500 Sierra Classic Long Bed

11-04-2008, 05:28 PM	#3
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: Interchangeable brake booster? The 2 types are HD (dual diapram) and non HD. If I remember correctly the rod is different lengths. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

11-05-2008, 12:46 AM	#4
71Farmtruck Junk Junkie Join Date: Oct 2007 Location: Humble, TX Posts: 123	Re: Interchangeable brake booster? Well, I was wrong on the diameter, they are both the same. The good other one is thicker, I'll bet its the dual diaphragm. It came off a suburban. I lined them up side by side and there was no noticeable difference in rod length in this instance. I tore it all down and removed the old one, I have the new one loosely on there, we'll see how it all runs when everything is tightened up. __________________ Mike 71 Chevrolet C-10 Short Bed Stepside 81 GMC 1500 Sierra Classic Long Bed

11-05-2008, 05:01 PM	#5
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: Interchangeable brake booster? All the burbs I have ever worked on or took apart had HD boosters, did you swap rods from one to the other or use what was on the booster? __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

11-07-2008, 10:23 AM	#6
71Farmtruck Junk Junkie Join Date: Oct 2007 Location: Humble, TX Posts: 123	Re: Interchangeable brake booster? It swapped over fine, I used the burb's rod, bolted in like it belonged there. I am still unable to make this turd idle, keeps dying out. __________________ Mike 71 Chevrolet C-10 Short Bed Stepside 81 GMC 1500 Sierra Classic Long Bed

11-07-2008, 03:29 PM	#7
71Farmtruck Junk Junkie Join Date: Oct 2007 Location: Humble, TX Posts: 123	Re: Interchangeable brake booster? Figured it out, it is flooding. __________________ Mike 71 Chevrolet C-10 Short Bed Stepside 81 GMC 1500 Sierra Classic Long Bed

11-07-2008, 03:51 PM	#8
Pyrotechnic Registered User Join Date: Feb 2007 Location: Austin, TX Posts: 3,930	Re: Interchangeable brake booster? That's weird. One time I had a truck with the light duty boost and put the HD booster on it. Used the same rod and it worked just fine. __________________ 1977 GMC Sierra Grande

11-07-2008, 10:42 PM	#9
71Farmtruck Junk Junkie Join Date: Oct 2007 Location: Humble, TX Posts: 123	Re: Interchangeable brake booster? That was the case with mine, bolted up fine. __________________ Mike 71 Chevrolet C-10 Short Bed Stepside 81 GMC 1500 Sierra Classic Long Bed

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