Proportioning valve question
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Senior User
Joined: Sep 2009
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From: Sidney, BC, Canada
Proportioning valve question
Before I get flamed, I did search but didn't find the answer I needed, so here goes.
My 67 F250 4x4 has manual drums. I don't want to convert to discs, but I would like improved braking.
My thought is to swap in a vacuum assist unit and wind up with power drums.
One other proviso: my cab is a 68...
Qustions:
1: From what I've read there were three different proportioning valves used in 67. Do I need to change mine from what I've got?
2: Also, from what I've read the 67 booster is different than 68-72. Is it different enough that I can't use a 68-72?
3: Can my existing master cylinder bolt onto the vacuum assist or do I need a different one?
Thanks!
darrell
My 67 F250 4x4 has manual drums. I don't want to convert to discs, but I would like improved braking.
My thought is to swap in a vacuum assist unit and wind up with power drums.
One other proviso: my cab is a 68...
Qustions:
1: From what I've read there were three different proportioning valves used in 67. Do I need to change mine from what I've got?
2: Also, from what I've read the 67 booster is different than 68-72. Is it different enough that I can't use a 68-72?
3: Can my existing master cylinder bolt onto the vacuum assist or do I need a different one?
Thanks!
darrell
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
Uh huh. There's one on the OP's truck...now.Ford installed a proportioning valve on EVERY 1967 and later Passenger Car, F100/350, Bronco & Econoline with a dual master cylinder.
In addition, 1968/72 F250 2WD's and F350's with (optional) power disc brakes use a brake pressure metering valve (C8TZ2B161A).
C7TZ2B257B .. Brake Differential Proportioning Valve
Fits: 1967 F100 4WD.
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C7TZ2B257D .. Brake Differential Proportioning Valve
Fits: 1967 F250 4WD.
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C8TZ2B257B .. Brake Differential Proportioning Valve
Fits: 1968/72 F100 4WD.
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C8TZ2B257C .. Brake Differential Proportioning Valve
Fits: 1968/72 F250 4WD.
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There are THREE more for 1967/72 F100/250 2WD's & F350's.
DarrellJ: F100/250 4WD's were not available with power drum brakes until 1972. 1976 was the first year disc brakes were available on 4WD's.
1967 F100/350's have a ONE YEAR ONLY: Brake (and Clutch) Pedal, the bracket they hang from under the dash, booster (2WD), master cylinder..and the firewall is 1967 only.
The cab is from a 1968, so I would assume the pedals and etc are too.
Thread Starter
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Senior User
Joined: Sep 2009
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From: Sidney, BC, Canada
Bill, as always your knowledge and help are invaluable! Thanks!
Just so I'm clear then, I should go look for a booster off a 68-72 2wd f250, and the booster on my 67 2wd f250 parts truck will not fit (due to my 68 cab).
Is this correct?
darrell
Just so I'm clear then, I should go look for a booster off a 68-72 2wd f250, and the booster on my 67 2wd f250 parts truck will not fit (due to my 68 cab).
Is this correct?
darrell
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
Fits: 1973/75 F100/250 4WD w/Power Drum Brakes // 1975 F150 4WD w/Power Drum Brakes.
Fits: 1972 F100/250 2WD & 4WD w/Power Drum Brakes
Fits: 1968/72 F250/350 w/Disc Brakes // 1971/72 F350 w/Power Drum Brakes.
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tfmech
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
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Jul 14, 2012 11:54 AM
1968, 97, brake, cylinder, differential, f350, ford, master, metering, proportion, proportioning, propotioning, series, truck, valve
