1974 F100 302/C6 - Manual to Power Brakes
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Mountain Pass
Joined: Oct 2020
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1974 F100 302/C6 - Manual to Power Brakes
Just picked up a new to me 1974 F100, 302/C6 and want to convert the manual brakes to power for the fiancée.
What’s the best solution on the market these days? Cobbling together factory parts or grabbing one of the master / booster combos that are available for sale but seem universal?
Thanks!
What’s the best solution on the market these days? Cobbling together factory parts or grabbing one of the master / booster combos that are available for sale but seem universal?
Thanks!
Hotshot
Joined: Feb 2004
Posts: 10,808
Likes: 2,604
From: The Shenandoah Valley
I did it with a '65 Goat, I just swapped in a booster / mc from a recently wrecked '66. Perfect. No need to change anything else ... even with a '74 F-100 that I can think of. Might not need anything but the booster.
FTE Legend
Joined: Nov 2015
Posts: 30,915
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From: Angier, NC
I have done a power to non power on a non ford and a non power to power on my 81 F100 and both of them the pedal pivot to pin for the MC rod were different.
I both cases I had complete parts cars / truck to swap parts between to make it happen.
Dave ----
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
1973/78 F100 2WD: Manual disc brakes were standard equipment, power disc brakes were optional.
1973/79 F100/350: There are 22 different brake pedals, 19 different power brake boosters, 17 different master cylinders, 7 different clutch pedals, I kid you not!
The brake pedal used with power disc brakes is different than the brake pedal used with manual disc brakes.
You will need to change the brake pedal and the master cylinder, adding a power brake booster.
Make sure that the brake pedal you acquire has this Ford ID number stamped on it.
D3TZ-2455-A .. Brake Pedal - Use with Power Disc Brakes / Stamped: D3TA-2455-AA / Obsolete
1973/74 F100 2WD // 1975/76 F100 2WD without Speed Control /// 1975/76 F150 2WD without Speed Control /// 1973/74 F250 2WD w/6200 lbs. GVWR
1975/76 F250 2WD with 6200 lbs. GVWR without Speed Control. The GVWR (Gross Vehicle Weight Rating) is stamped on the 3rd line of the Warranty Plate, riveted to the left door face below the latch.
1973/79 F100/350: There are 22 different brake pedals, 19 different power brake boosters, 17 different master cylinders, 7 different clutch pedals, I kid you not!
The brake pedal used with power disc brakes is different than the brake pedal used with manual disc brakes.
You will need to change the brake pedal and the master cylinder, adding a power brake booster.
Make sure that the brake pedal you acquire has this Ford ID number stamped on it.
D3TZ-2455-A .. Brake Pedal - Use with Power Disc Brakes / Stamped: D3TA-2455-AA / Obsolete
1973/74 F100 2WD // 1975/76 F100 2WD without Speed Control /// 1975/76 F150 2WD without Speed Control /// 1973/74 F250 2WD w/6200 lbs. GVWR
1975/76 F250 2WD with 6200 lbs. GVWR without Speed Control. The GVWR (Gross Vehicle Weight Rating) is stamped on the 3rd line of the Warranty Plate, riveted to the left door face below the latch.
Hotshot
Joined: Feb 2004
Posts: 10,808
Likes: 2,604
From: The Shenandoah Valley
To be fair, I only said
Might not need anything but the booster.
My '77 F-150 is wearing a F-350 dual diaphragm booster and master cylinder combo and Thunderbird calipers (larger pistons ... now fed by larger MC piston assisted with more booster help than was OEM in a F-150) modified to accept F-150 hoses in front (because the hoses were brand new, I have braided stuff and fittings in a cabinet too). It's much better than stock was, but you will not find those parts put together in a factory book.
It would help a bit to know what his factory set up is with non boosted brakes, how the attachment is at the firewall, bell crank or not, etc. I don't know if disc or drum, 2 or 4wd. I know there were a lot of various combinations used depending on year, GVWR, power, non power, etc.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
It would help a bit to know what his factory set up is with non boosted brakes, how the attachment is at the firewall, bell crank or not, etc. I don't know if disc or drum, 2 or 4wd. I know there were a lot of various combinations used depending on year, GVWR, power, non power, etc.
OP has a 1974 F100 2WD 302 with manual disc brakes. I gave the OP the info on the power brake pedal he needs, listing all the applications for it.
I've been through all this jazz many times of FTE .. People are unaware of what needs to be changed. The main thing is: the brake pedal MUST match the brake booster.
Hotshot
Joined: Feb 2004
Posts: 10,808
Likes: 2,604
From: The Shenandoah Valley
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Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
No 302's with 4WD until 1980.
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Thread Starter
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Mountain Pass
Joined: Oct 2020
Posts: 113
Likes: 90
Thank you for all the feedback everyone!
Did some digging and ended up purchasing this on eBay:
https://www.ebay.com/itm/185858325033
Couldn't see the part number on the pedal in any real detail but looks like this one comes with the firewall bracket for the booster too so I'm crossing my fingers. Look like it's in the ballpark of what's needed?
https://www.ebay.com/itm/185858325033
Couldn't see the part number on the pedal in any real detail but looks like this one comes with the firewall bracket for the booster too so I'm crossing my fingers. Look like it's in the ballpark of what's needed?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
Thank you for all the feedback everyone!
Did some digging and ended up purchasing this on eBay:
https://www.ebay.com/itm/185858325033
Couldn't see the part number on the pedal in any real detail but looks like this one comes with the firewall bracket for the booster too so I'm crossing my fingers. Look like it's in the ballpark of what's needed?
Did some digging and ended up purchasing this on eBay:
https://www.ebay.com/itm/185858325033
Couldn't see the part number on the pedal in any real detail but looks like this one comes with the firewall bracket for the booster too so I'm crossing my fingers. Look like it's in the ballpark of what's needed?
The sellers listing is incorrect, because there's no such thing as a 1973/79 brake pedal.
Most ebay sellers haven't a single clue what the parts fit, even if they are new in the box with a part number marked on it.
Thread Starter
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Mountain Pass
Joined: Oct 2020
Posts: 113
Likes: 90
Did you ask the seller what the number was on the pedal? 1977/79 is different, 1973/76 & 1977/79 is different with Speed Control.
The sellers listing is incorrect, because there's no such thing as a 1973/79 brake pedal.
Most ebay sellers haven't a single clue what the parts fit, even if they are new in the box with a part number marked on it.
The sellers listing is incorrect, because there's no such thing as a 1973/79 brake pedal.
Most ebay sellers haven't a single clue what the parts fit, even if they are new in the box with a part number marked on it.
If true, would that put me on the ballpark of what I would need?
Thank you!
FTE Legend
Joined: Nov 2015
Posts: 30,915
Likes: 4,123
From: Angier, NC
Guess when you get the parts you could check the ID number on the pedal to see if it matches what Bill posted.
The other would be to check the distance between the pivot at the top and the pin the MC rod hooks to as they should be different.
The real reason you want the right pedal is how much pressure from your leg to make it stop.
If the ratio is not right it may take 2 legs to make it stop (if you are lucky to stop) or just breath on the pedal and you are going thru the front glass!
The same also holds true for the bore / stroke of the master and what it is supplying to each wheel.
To small a bore and not enough stroke and it will not supply juice to the wheels and will not stop.
Ford did the work to match everything so it works so I cant see changing it but that's me.
Dave ----
The other would be to check the distance between the pivot at the top and the pin the MC rod hooks to as they should be different.
The real reason you want the right pedal is how much pressure from your leg to make it stop.
If the ratio is not right it may take 2 legs to make it stop (if you are lucky to stop) or just breath on the pedal and you are going thru the front glass!
The same also holds true for the bore / stroke of the master and what it is supplying to each wheel.
To small a bore and not enough stroke and it will not supply juice to the wheels and will not stop.
Ford did the work to match everything so it works so I cant see changing it but that's me.
Dave ----
Thread Starter
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Mountain Pass
Joined: Oct 2020
Posts: 113
Likes: 90
Circling back as the parts from eBay have arrived.
The pedal I received has D3TA-AA stamped in place, not the middle 2455 however.
Anything I'm missing or does it look like I'm good to go with the eBay parts gamble?
Did you ask the seller what the number was on the pedal? 1977/79 is different, 1973/76 & 1977/79 is different with Speed Control.
The sellers listing is incorrect, because there's no such thing as a 1973/79 brake pedal.
Most ebay sellers haven't a single clue what the parts fit, even if they are new in the box with a part number marked on it.
The sellers listing is incorrect, because there's no such thing as a 1973/79 brake pedal.
Most ebay sellers haven't a single clue what the parts fit, even if they are new in the box with a part number marked on it.
Anything I'm missing or does it look like I'm good to go with the eBay parts gamble?
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