More brake pedal issues.
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Senior User
Joined: Jun 2009
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More brake pedal issues.
I didn't start with a complete truck so I'm kinda mixing and matching parts here.
This is from a manual transmission truck. Cab is from 1976. Pedal bracket is stamped with 1979 and the pedal itself has the following part number D8TA-2455-TA "power brake". The bell crank that mounts between the booster and the firewall doesn't have any markings on it. The booster and master cylinder are from a 1978 F350.
The problem I'm having is that the hole in the link from the bell crank doesn't line up with the hole in the brake pedal. Also, the link will hit on the bottom of the opening in the firewall/bracket assembly.
Any suggestions?
Thanks.
This is from a manual transmission truck. Cab is from 1976. Pedal bracket is stamped with 1979 and the pedal itself has the following part number D8TA-2455-TA "power brake". The bell crank that mounts between the booster and the firewall doesn't have any markings on it. The booster and master cylinder are from a 1978 F350.
The problem I'm having is that the hole in the link from the bell crank doesn't line up with the hole in the brake pedal. Also, the link will hit on the bottom of the opening in the firewall/bracket assembly.
Any suggestions?
Thanks.
Cargo Master
Joined: Oct 2010
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Time to break out the tape measure. There were a ton if different boosters and pedal set combinations from 73-79. You are going to have to measure the pivot points and firewall distances to get a working combo. Unless you pull a complete booster/ pedal set from another truck, which would make more sense.
It sounds like you are running the wrong booster with those pedals or the wrong booster brackets on the firewall side.
It sounds like you are running the wrong booster with those pedals or the wrong booster brackets on the firewall side.
Save the old ones
Joined: Dec 2002
Posts: 666
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From: Boyne Mich
The 79 pedal is different from the 76.
76 uses the bell crank assembly where as the 79 connects directly to the vacuum booster rod.
There are like 20 something different pedals for the dent sides. I just went through this for my 79.
Really have to have the correct pedal for the cab. Also there could be difference for manual vs power brakes.
76 uses the bell crank assembly where as the 79 connects directly to the vacuum booster rod.
There are like 20 something different pedals for the dent sides. I just went through this for my 79.
Really have to have the correct pedal for the cab. Also there could be difference for manual vs power brakes.
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Pretty sure at least some 79's used the bellcrank between the firewall and the booster. A buddy has a 79 and yes it does have the bell crank. That's how I knew I was missing something. All of the parts mount up to the cab fine but the bell crank linkage hits on the opening in the firewall and the bottom cross bar of the brake pedal bracket.
Did they make different bell cranks?
Did they make different bell cranks?
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
I didn't start with a complete truck so I'm kinda mixing and matching parts here. This is from a manual transmission truck.
Cab is from 1976. Pedal bracket is stamped with 1979 and the pedal itself has the following ID engineering number: D8TA-2455-TA "power brake."
The bell crank that mounts between the booster and the firewall doesn't have any markings on it.
The booster and master cylinder are from a 1978 F350.
With or without Speed Control?
The problem I'm having is that the hole in the link from the bell crank doesn't line up with the hole in the brake pedal. Also, the link will hit on the bottom of the opening in the firewall/bracket assembly.
Cab is from 1976. Pedal bracket is stamped with 1979 and the pedal itself has the following ID engineering number: D8TA-2455-TA "power brake."
The bell crank that mounts between the booster and the firewall doesn't have any markings on it.
The booster and master cylinder are from a 1978 F350.
With or without Speed Control?
The problem I'm having is that the hole in the link from the bell crank doesn't line up with the hole in the brake pedal. Also, the link will hit on the bottom of the opening in the firewall/bracket assembly.
1973/79 F100/350: There are TWENTY TWO different brake pedals, NINETEEN different P/B boosters, SEVENTEEN different master cylinders and SEVEN different clutch pedals, I kid you not.
Whatever booster you use must match the brake pedal.
Marked with ID engineering number: D8TA-2455-TA = Ford part number: D9TZ-2455-A .. Brake Pedal / Obsolete
Applications: 1979 F100/350 with Power Brakes without Speed Control from serial number DJ0,001.
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So did they make different bell cranks or were they considered part of the brake pedal assembly?
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Ford Parts Specialist
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From: Simi Valley, CA
What part are you referring to as a bell crank? Never heard of any such thing related to brake boosters.
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Ford Parts Specialist
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From: Simi Valley, CA
Brake pedal support does not include booster mounting bracket-that Ford only sold with new boosters.
D9TZ-1001508-A (replaced D3TZ-1001508-A) .. Brake Pedal Support-Use with M/T
1973/79 F100/350 & 1978/79 Bronco
------------------------------------------
D9TZ-1001508-B (replaced D3TZ-1001508-B & D8TZ-1001508-B) .. Brake Pedal Support-Use with A/T
1973/79 F100/350 & 1978/79 Bronco
These brackets, the gazillions of brake pedals/boosters/master cylinders/clutch pedals is the reason why attempting to mix and match parts on these trucks usually causes problems.
1967: There is ONE brake & clutch pedal, ONE brake pedal support. These parts are 1967 only / 1968/72 F100/350: There is ONE brake & clutch pedal, ONE brake pedal support.
D9TZ-1001508-A (replaced D3TZ-1001508-A) .. Brake Pedal Support-Use with M/T
1973/79 F100/350 & 1978/79 Bronco
------------------------------------------
D9TZ-1001508-B (replaced D3TZ-1001508-B & D8TZ-1001508-B) .. Brake Pedal Support-Use with A/T
1973/79 F100/350 & 1978/79 Bronco
These brackets, the gazillions of brake pedals/boosters/master cylinders/clutch pedals is the reason why attempting to mix and match parts on these trucks usually causes problems.
1967: There is ONE brake & clutch pedal, ONE brake pedal support. These parts are 1967 only / 1968/72 F100/350: There is ONE brake & clutch pedal, ONE brake pedal support.
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Well, after fitting everything together a couple of times I was able to drill two new holes in the brake pedal and link to get it to work. Looks like it will function just fine. Will be a while before its actually on the road to verify.
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From: Brownwood
Sorry for bothering you, I have a 77 F-100 that needs the engine replaced going back with the 6-300 love that engine! buit I want to but a better exhaust system on it, how and where do I find a intke that will work for the carb on the old one the exhaust heats up though the intake and opens up the top of the carb? Am I able to chancge the exhaust system?
Save the old ones
Joined: Dec 2002
Posts: 666
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From: Boyne Mich
PA 250
That will probably work but I think it would be better with the the right pedal for the linkage.
See how your brake pedal pivots on a bolt located above and closer to the firewall, that's 79 only. Most if not all pre 78 pedals are mounted on the same pivot shaft as the clutch pedal.
the first pic is a pre 78. notice the pivot of the brake pedal and there is no 2nd hole to mount the later 79 pedal.
the second pic is of my 79 with a 79 manual brake pedal. the 79 power brake uses the 2nd hole higher and closer to the firewall. this was before I switched the pedal for a power brake pedal
Both pictures show that a pedal mounted to clutch pivot would align better than the 2nd hole mount for the bell crank linkage and still have full stroke.
That will probably work but I think it would be better with the the right pedal for the linkage.
See how your brake pedal pivots on a bolt located above and closer to the firewall, that's 79 only. Most if not all pre 78 pedals are mounted on the same pivot shaft as the clutch pedal.
the first pic is a pre 78. notice the pivot of the brake pedal and there is no 2nd hole to mount the later 79 pedal.
the second pic is of my 79 with a 79 manual brake pedal. the 79 power brake uses the 2nd hole higher and closer to the firewall. this was before I switched the pedal for a power brake pedal
Both pictures show that a pedal mounted to clutch pivot would align better than the 2nd hole mount for the bell crank linkage and still have full stroke.
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Did the bell crank linkage change between 78 and 79 also? They must have if the pedals changed.
It would appear that I have a 79 pedal but a 78 linkage. That's why I left the stub end of the link in place in case I end up with a 78 pedal assembly. Like I mentioned though, it appears to work and allows full stroke of the booster. Time will tell.
It would appear that I have a 79 pedal but a 78 linkage. That's why I left the stub end of the link in place in case I end up with a 78 pedal assembly. Like I mentioned though, it appears to work and allows full stroke of the booster. Time will tell.
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hey there new to your site and id like to say thanks for the info!! i found ths site while trying to figure out my brake pedal issue! i have a 78 supercab and it has older pedal assembly. im thinking about doing the bell crank change that pa f250 did or just make a new bell crank the right size and shape. anyone have the dimensions for proper lenght and drop?