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Technical Ford C-6 transmission info/ help

Discussion in 'The Hokey Ass Message Board' started by Boneyard51, Feb 2, 2019.

  1. Boneyard51
    Joined: Dec 10, 2017
    Posts: 6,451

    Boneyard51
    Member

    I plan on putting a 428 or a 410 in my ride, with a C-6 transmission. I looked at several sites and found basic info, such as 4 different bell housing patterns and that it came in small cars, big cars, and trucks and was made from 1966 to the eighties or so. But that was about it.
    I’ve heard that 1966 models are kinda odd and some models have heavier duty parts.
    I know I will have to use the FE bell housing case and big car tail shaft.
    Are the internal parts all interchangeable between all C-6s? What transmissions would have the stronger parts. What do I need to look for? Thanks in advance.




    Bones
     
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  2. OLDSMAN
    Joined: Jul 20, 2006
    Posts: 2,422

    OLDSMAN
    BANNED

    Internals are basically the same 6 cylinder parts will not have as many clutch plates as the V-8 transmission will.
     
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  3. junkyardjeff
    Joined: Jul 23, 2005
    Posts: 8,596

    junkyardjeff
    Member

    I think the 66 C-6 also is a green dot so I would us a 67 and up trans.
     
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  4. boutlaw
    Joined: Apr 30, 2010
    Posts: 1,239

    boutlaw
    Member

    Just make sure the trans bell fits the FE and you'll be good. I would recommend the "R" servo with the 428. Your trans guy will know what that is and its easily changed externally. If you have to buy a flex plate for your FE, make sure and get the "flywheel reinforcement plate" which is the required ring that goes between the bolts and the flexplate, like a big 6 hole washer ring, otherwise flex plate will crack.
     
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  5. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 9,214

    mgtstumpy
    Member

    Ford-trans bellhousing.jpg
    C6 bolt hole patterns
     
  6. s55mercury66
    Joined: Jul 6, 2009
    Posts: 4,345

    s55mercury66
    Member
    from SW Wyoming

    There is a lot of parasitic drag in these, that can be reduced somewhat if you want to rollerize one. Frank Merkel has a post on the 460 forum that lays it all out in detail. You can also install lower first and second gears in one using parts from an E4OD. Also there are two different basic valve bodies, the early ones have the shift detents in them, and the later ones have the detents in the case. Notice I did not mention the green dot version, as no shift kit is available for it. Shift points and quality can be massaged a little by playing with the vacuum modulator and pin length, but if you really want to raise the shift points you will have to play with the governor. If you do that, and want to shift only by the governor, you can install a valve in the modulator vacuum line, and close it when racing. Do you want to hear about the 16 cent shift kit?
     
  7. Boneyard51
    Joined: Dec 10, 2017
    Posts: 6,451

    Boneyard51
    Member

    Tell me more! Lol




    Bones
     
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  8. s55mercury66
    Joined: Jul 6, 2009
    Posts: 4,345

    s55mercury66
    Member
    from SW Wyoming

     
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  9. elba
    Joined: Feb 9, 2013
    Posts: 628

    elba
    Member

    A C-6 caused me a hospital visit one time. I guess I really caused it . I was torquing the bolts that hold the pump in the case and the socket slipped off the bolt head and my fingers holding the torque wrench went over to the flange of the case and instant hurt and blood .. Stitches fixed my fingers .
    Maybe that would be a good thread to start "HOSPITAL VISITS "
     
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  10. sunbeam
    Joined: Oct 22, 2010
    Posts: 6,220

    sunbeam
    Member

    How quick do you need it I have a 76 FE buildable core that you can have that I can bring to the Tulsa swap meet in April.
     
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  11. Boneyard51
    Joined: Dec 10, 2017
    Posts: 6,451

    Boneyard51
    Member

    Sunbeam, that would be great! I’m in no hurry.... I am the King of procrastination! Lol. I try to make that swap meet as often as I can.
    I’ve visited your town many times, used to be a Canonball hay bed dealer, back in the day.




    Bones
     
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  12. s55mercury66
    Joined: Jul 6, 2009
    Posts: 4,345

    s55mercury66
    Member
    from SW Wyoming

    Bones, I am searching for my notes on the C6, they will turn up in a day or two, and I will post up the valve body and seperator plate mods. They are really simple, and cheap. I want to see if anyone else has some input on them also. Myself, I grab every one I can, just for the extra internals.
     
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  13. saltflats
    Joined: Aug 14, 2007
    Posts: 12,602

    saltflats
    Member
    from Missouri

    I just did one of those not long ago.
    Got all the parts from, PATC.
     
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  14. merc66rkm
    Joined: May 6, 2010
    Posts: 4

    merc66rkm
    Member

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