Front axle options.
Lead Driver
Joined: Nov 2006
Posts: 5,217
Likes: 506
From: Pa.
It's hard to say on the booster but the proportioning valve and master cylinder for sure .. You can also use an adjustable after market proportioning valve .. On the booster I'm leaning towards you probably be alright on that
Cargo Master
Joined: Nov 2009
Posts: 2,364
Likes: 117
From: starship enterprise
You are correct. The way I understand it is that the drum brake master cylinders hold slightly more pressure in the system and when used with disk brakes your brakes can drag. If you use a disk master with drums, it is usually spongy. It is important to make sure your master cylinder is correct. Bill claims that there are like 22 different master cylinders and I am sure he is right, but unfortunately for us, the parts houses seem to have consolidated this to a more manageable interchange. My experience with cross referencing parts is there has been a lot of superceding and elimination of many of these parts that would interchange with another part#.
The result is if your original master cylinder was specifically for a 79 f350 2wd trailer special with dual piston calipers, noe your local napa will casually say "Yeah, We have that but it has been superceded to interchange with the 4x4 regular f250 with dual piston calipers. My book recommends to also install new lines, hoses, and calipers along with this part."
A prime example was the 79 f250 calipers, the first set I baught was specific left and right, then they were machined and the bleeder was reemed out to accept the banjo bolt and included a new bleeder screw, and lone and behold now you swap the line to the other side and you have one caliper that fits left or right. Same caliiper, but interchangeable.
The result is if your original master cylinder was specifically for a 79 f350 2wd trailer special with dual piston calipers, noe your local napa will casually say "Yeah, We have that but it has been superceded to interchange with the 4x4 regular f250 with dual piston calipers. My book recommends to also install new lines, hoses, and calipers along with this part."
A prime example was the 79 f250 calipers, the first set I baught was specific left and right, then they were machined and the bleeder was reemed out to accept the banjo bolt and included a new bleeder screw, and lone and behold now you swap the line to the other side and you have one caliper that fits left or right. Same caliiper, but interchangeable.
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Postmaster
Joined: Jul 2009
Posts: 4,094
Likes: 5
From: Central Illinois
You are correct. The way I understand it is that the drum brake master cylinders hold slightly more pressure in the system and when used with disk brakes your brakes can drag. If you use a disk master with drums, it is usually spongy. It is important to make sure your master cylinder is correct. Bill claims that there are like 22 different master cylinders and I am sure he is right, but unfortunately for us, the parts houses seem to have consolidated this to a more manageable interchange. My experience with cross referencing parts is there has been a lot of superceding and elimination of many of these parts that would interchange with another part#.
The result is if your original master cylinder was specifically for a 79 f350 2wd trailer special with dual piston calipers, noe your local napa will casually say "Yeah, We have that but it has been superceded to interchange with the 4x4 regular f250 with dual piston calipers. My book recommends to also install new lines, hoses, and calipers along with this part."
A prime example was the 79 f250 calipers, the first set I baught was specific left and right, then they were machined and the bleeder was reemed out to accept the banjo bolt and included a new bleeder screw, and lone and behold now you swap the line to the other side and you have one caliper that fits left or right. Same caliiper, but interchangeable.
The result is if your original master cylinder was specifically for a 79 f350 2wd trailer special with dual piston calipers, noe your local napa will casually say "Yeah, We have that but it has been superceded to interchange with the 4x4 regular f250 with dual piston calipers. My book recommends to also install new lines, hoses, and calipers along with this part."
A prime example was the 79 f250 calipers, the first set I baught was specific left and right, then they were machined and the bleeder was reemed out to accept the banjo bolt and included a new bleeder screw, and lone and behold now you swap the line to the other side and you have one caliper that fits left or right. Same caliiper, but interchangeable.
Good information.
All of the brake lines were replaced by the PO, but I will replace any line that I have to disconnect.
I'm off to go get greasy.
Have a great Saturday all.
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