4WD and 2WD differences
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Fleet Mechanic
Joined: Jul 2002
Posts: 1,297
Likes: 34
From: S/W Virginia
4WD and 2WD differences
So I'm working on getting a 78 F150 4x4 going. My local junkyard has a couple of 78 2WDs. There are a few things I'm looking at getting and wanted to make sure they would interchange
1. Brake distribution block/proportioning valve.
2. Master cylinder brake lines
3. Crossmember on frame right in from of the rear tank. Mine is bent up and has some rust. Thought I might cut one out and bolt in mine.
1. Brake distribution block/proportioning valve.
2. Master cylinder brake lines
3. Crossmember on frame right in from of the rear tank. Mine is bent up and has some rust. Thought I might cut one out and bolt in mine.
Logistics Pro
Joined: Jan 2005
Posts: 3,534
Likes: 85
From: penn twp.
AFAIK all of those items are interchangeable. The majority of the differences in the frames are at the front end for the mounting of the front differential. However as far as the proportioning valve is concerned. They almost never fail. And when they do it's pretty much due to dirt getting into the brake lines during line replacement. So if it were me I would look into getting a new not used proportioning valve to minimize the risk of dirt getting into the valve. What makes you think the valve is bad and needs to be replaced?
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Fleet Mechanic
Joined: Jul 2002
Posts: 1,297
Likes: 34
From: S/W Virginia
I've not tried it yet, but the truck hasn't been on the road in almost 30 years and the master cylinder was dry and locked solid. The one at my local junkyard was on the road recently. Still has a good inspection sticker
Laughing Gas
Joined: Aug 2020
Posts: 821
Likes: 292
From: Pelham Alabama
Ideal,
30 years not on the road,,, If it was mine, to be safe, I would replace all brake parts, Master cyl, calipers, new lines, wheel cyls, all rubber hoses and such.
You get the idea.
Alex
30 years not on the road,,, If it was mine, to be safe, I would replace all brake parts, Master cyl, calipers, new lines, wheel cyls, all rubber hoses and such.
You get the idea.
Alex
Moderator & parts slinger
Joined: Feb 2007
Posts: 50,157
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From: S/W Missouri, Polk county
Here is a place that makes it easy to do. https://www.inlinetube.com/collectio...rd&model=f-150
Logistics Pro
Joined: Jan 2005
Posts: 3,534
Likes: 85
From: penn twp.
I'd highly recommend doing the same thing.
Tuned
Joined: Sep 2015
Posts: 484
Likes: 51
From: Lincoln, Nebraska
All that’s been mentioned. I bought the east wood lines flaring tool and made all my lines. I started with prebent kit but got frustrated trying to make them fit. The tool was maybe the cost of prebent kit. That, a coil of line, ends, tubing cutter, reamer, and a bending tool (and a bunch of time) should get you there. Maybe look into getting your mc/booster rebuilt since you know they fit. Prior brake rebuilt mine. Don’t throw parts away until well after you’re up and running. Fwiw
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Fleet Mechanic
Joined: Jul 2002
Posts: 1,297
Likes: 34
From: S/W Virginia
What's the consensus on buying pre bent vs bending my own? I've done a lot of bending and flaring 20 or so years ago when I re did my f100 and mustang.
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Cargo Master
Joined: Dec 2015
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I would bend and flare your own. I did mine w=h a harbor freight tool. Then I had to re-flare some double flares. They were still bad and I then got a good tool. I wasted a lot of time trying to fix them. Could have been a little worse if I had to start over with new brake line.
Logistics Pro
Joined: Jan 2005
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From: penn twp.
I think there's a lot of variables that can go into this decision. Like what type of line you're choosing to go with? How are your mechanical skills? How much do you enjoy tinkering on your project? Do you already have the tools? If not are you willing to buy said tools? For me if I were looking at just replacing brake lines with standard carbon steel, coated steel or copper I'd just make the lines myself. But if I were choosing stainless steel lines, I'd buy the pre bent pre flared lines. From what I understand, stainless is much more difficult to flare and requires a hydraulic flaring tool to make the flares. So going that route I'd definitely go with Inline Tube.
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Fleet Mechanic
Joined: Jul 2002
Posts: 1,297
Likes: 34
From: S/W Virginia
I have one of the cheaper bar style flaring tools that I've used on my other projects. I'd say my mechanical skills are pretty good and I do like working on my project. Last time I did brake work it was with steel lines. It seems that now the best to use is the nickel copper line.
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