1977 Highboy
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New User
Joined: May 2009
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From: In the country
1977 Highboy
Hello all, i am new to this site and i have a question and heard some stuff but want to make sure. I have a 1977 F -250 with a 400, the brake pedal is at normal height when the engine is NOT running. When i start it the pedal goes straight to the floor and is stuck there, until i shut it off... brake booster?
Hotshot
Joined: Aug 2007
Posts: 12,183
Likes: 18
From: St. Charles, Missouri.
Most Likely.
Or your booster/Brake Master Cylinder is shot?
I beileve the first year for power brakes is '76.
-----------------------------------------------------------------------------------------------------------------------
A Hiboy is a Ford truck that came from the factory as having the following:
- Built from 1967 thru 1977.5.
- F-250.
- 4x4.
- Divorced transfer case.
Trucks that are NOT considered a Hiboy are:
- Any truck built after mid-1977. It goes by Consecutive Build Number in the VIN# anything built starting Y80001 is a 77 1/2. **
- Anything other than an F-250.
There will always be a couple very oddball exceptions but, for the most part, this is it.
Front axle choices in the Hiboy were either the 8 lug Dana 44 or the old style low-slung pinion Dana 60 (commonly referred to as the Dana 50). Engine choices were either the 6 cylinder or 360 2 bbl. Steering was either manual or power ram assist.
-Basic definition provided by user: BigBuddy
Or your booster/Brake Master Cylinder is shot?
I beileve the first year for power brakes is '76.
-----------------------------------------------------------------------------------------------------------------------
A Hiboy is a Ford truck that came from the factory as having the following:
- Built from 1967 thru 1977.5.
- F-250.
- 4x4.
- Divorced transfer case.
Trucks that are NOT considered a Hiboy are:
- Any truck built after mid-1977. It goes by Consecutive Build Number in the VIN# anything built starting Y80001 is a 77 1/2. **
- Anything other than an F-250.
There will always be a couple very oddball exceptions but, for the most part, this is it.
Front axle choices in the Hiboy were either the 8 lug Dana 44 or the old style low-slung pinion Dana 60 (commonly referred to as the Dana 50). Engine choices were either the 6 cylinder or 360 2 bbl. Steering was either manual or power ram assist.
-Basic definition provided by user: BigBuddy
Cargo Master
Joined: Sep 2003
Posts: 2,110
Likes: 32
From: southwest pa
the first year for disc brakes is 76, im pretty sure power was available in 73. i would switch to the dual diaphragm booster and m/c if your going to replace the stuff. i always like to upgrade when serviceable parts wear out.
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