1977 CC brake booster problem
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1977 CC brake booster problem
I got a 1977 f250 crewcab 4x4. When I bought it the brakes were a complete mess. Found out that the previous owner had used a f350 brake booster. The previous owner welded a longer rod onto the booster. I bought a 1979 f350 booster and it is 2 Inches too short.. Please help!!! thanks
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The new booster end is rounded and curved, where the old booster rod end is straight. For the numerous part numbers you posted, i don't know what they mean. I looked at the rod end of the new booster, and it says f46. For the old, well it's fubar....thanks for your help in advance...
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Just like I suspected . you got the booster from a 79 truck built DJ0001 and newer.
For the 77 You need the FT-39 booster
Precision Part #2512300
The one you got mounts directly to and thru the firewall to the pedal.
The one you need mounts to a fulcrum type bracket outside the firewall.
Like this:
For the 77 You need the FT-39 booster
Precision Part #2512300
The one you got mounts directly to and thru the firewall to the pedal.
The one you need mounts to a fulcrum type bracket outside the firewall.
Like this:
Last edited by Mil1ion; Aug 29, 2007 at 10:42 AM.
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Yes, I've searched the forums about different boosters etc...due to my misfortune, my truck is *******ized....My truck doesn't have the fulcrum linkage at all....Someone welded an extra piece to the old booster making the total length of the rod approximately 10 inches long....The new booster, which is labeled f46 is approximately 8 inches long...Do I need a different pedal, or should I be looking for a fulcrum linkage for a 77? Yes, the one I took out goes directly to the pedal...thanks
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I think if I were you I'd make a trip to the junkyard and see if you can find the right year setup for your truck. Buy the fulcrum thingy from them and then order the proper booster/master cylinder.
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that better? 
There are definitely a lot of differences. I went through this with my 79CC. I had a 76CC for parts but the booster setup was fairly different, although it didn't have the fulcrum that million was talking about.
I ended up buying a complete setup for an f350 4x4 and it bolted right in.
There are definitely a lot of differences. I went through this with my 79CC. I had a 76CC for parts but the booster setup was fairly different, although it didn't have the fulcrum that million was talking about.
I ended up buying a complete setup for an f350 4x4 and it bolted right in.
Last edited by Slow; Aug 29, 2007 at 03:21 PM.
Fleet Mechanic
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From: Piney Woods of East Texas
The early models use a fulcrum point to increase the power to the brakes. Some the petal went straight to the booster. I have mine apart and can take pictures if needed. Mine are off a 74 F100 I think.
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A Photo of each booster will soon be posted so those that don;t know what I'm talking about will see.
NOTE:
1979 Model Year is the crucial area of concern.
Consecutive build Number DJ-0001 is the cut -off point.
Any F150/250/350 built before that date has the special lever system brake booster activation.
Any F150/250/350 Built after that Date..... requires the NEW design special THRU TO PEDAL booster.
Pre - DJ-0001 F150/250 Booster
Post DJ-0001 F150/250 Booster
Pre - DJ0001 F350 Booster (This is the one Normally used in the Upgrade to allow for tall valve covers to be installed)
NOTE:
1979 Model Year is the crucial area of concern.
Consecutive build Number DJ-0001 is the cut -off point.
Any F150/250/350 built before that date has the special lever system brake booster activation.
Any F150/250/350 Built after that Date..... requires the NEW design special THRU TO PEDAL booster.
Pre - DJ-0001 F150/250 Booster
Post DJ-0001 F150/250 Booster
Pre - DJ0001 F350 Booster (This is the one Normally used in the Upgrade to allow for tall valve covers to be installed)
Last edited by Mil1ion; Aug 29, 2007 at 06:35 PM.
