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Discussion Starter · #1 ·
I have a 1974 Dodge W-100 Power Wagon with a 318 and 4 on the floor. I think my Power Brake Booster is shot. I'm not up on Mopar Body stuff. Can someone tell me if this Power Booster below will fit my W-100??? Thanks for any answers Folks. Jim

1962-74 Mopar A B E Body 8" Power Brake Booster Master Cyl
 

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What are your brakes actually doing?

Are they like standing on drum brakes and not a great deal happening(I'm assuming disc brake front end)?

Have you pulled the vacuum hose off the booster and tried the brakes to see if it's any different in feeling?
 

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Discussion Starter · #4 ·
Kevin, I pulled the vacuum hose and tried to create a vacuum by sucking on it and building a vacuum but it bled off nearly immediately. I think the diaphragm is shot. What I asked was, will a booster that fits a 1962-74 Mopar A B E Body 8" Power Brake Booster Master Cyl fit my 1974 W-100?? I can't seem to find the exact booster online that says distinctly for the W-100. It's those A B E Body things I don't know about.
 

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Kevin, I pulled the vacuum hose and tried to create a vacuum by sucking on it and building a vacuum but it bled off nearly immediately. I think the diaphragm is shot. What I asked was, will a booster that fits a 1962-74 Mopar A B E Body 8" Power Brake Booster Master Cyl fit my 1974 W-100?? I can't seem to find the exact booster online that says distinctly for the W-100. It's those A B E Body things I don't know about.
So I'm thinking that surely in the US that there's a repair kit available somewhere for the brake booster. Your biggest problem will be pulling the booster apart as I'm sure there's a fairly decent spring in there under pressure so it needs to be pulled apart carefully.
 

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The reason I suggested you confirm vacuum at the booster is because I worked in auto repair for a number of years and this was a money maker for some shops. There was a leakey vacuum hose and they sold the customer a new or rebuilt booster and only changes a couple of $2 hoses and wiped the booster down to make it look clean.
 

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Discussion Starter · #8 ·
Kevin, they used to have Kits for everything and now you damned neared have to just buy a new rig to get something replaced! You can't even get Brushes for an alternator any more or a starter. Shane, thanks for the Rock Auto Site. I've bought stuff from them before. Thanks for the information fellas.
 

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I'd check around to see of you have a commercial brake booster rebuilder nearby. Usually the guys that have the ability to rebuild parts for the big trucks can do a booster on your truck. Using one of these guys you get the exact one that fits your truck since it came off of your truck. The diaphragms are easily replaced with the proper tools. You can buy a rebuilt unit online but there are 2 made for your truck. You'll need to know which one before ordering....IF they have one in stock. Might call to see if they can do the rebuild on yours if you can't find someone local.
https://drive.google.com/file/d/0BxzO_Oy1EMLIQ3ZTd1FtbWR1TjA/view
https://www.vintagepowerwagons.com/online-parts-catalog
 
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