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Difference between C4 and C6 trannys

Discussion in 'The Hokey Ass Message Board' started by 56KUSTOM, Aug 7, 2007.

  1. 56KUSTOM
    Joined: Apr 26, 2005
    Posts: 3,102

    56KUSTOM
    Member

    How do you identify?
     
  2. hambnbeans
    Joined: Aug 1, 2007
    Posts: 47

    hambnbeans
    BANNED
    from wyoming

    If you can rap the **** out of it and dump it into gear its a C6.
     
  3. punkabilly1306
    Joined: Aug 22, 2005
    Posts: 2,655

    punkabilly1306
    Member
    from ohio

    ok so what if its laying in a yard, not hooked to anything and where you dont have the ability to "rap the **** out of it and dump it into gear"....then how do you tell?
     
  4. old beet
    Joined: Sep 25, 2002
    Posts: 5,750

    old beet
    Member

    If you can remove the bellhousing its a C4..C6 is one piece....OLDBEET
     
  5. Ford Freak
    Joined: Jan 5, 2005
    Posts: 827

    Ford Freak
    Member

    Pick them up. The lighter one is the C 4 !!
     
  6. HOT40ROD
    Joined: Jun 16, 2006
    Posts: 961

    HOT40ROD
    Member
    from Easton, Pa

    On the C6 the bell and the main body is one piece. The C4 and the FMX have a bells that will unbolt. The C4 Has an aluminum main body were the FMX has a cast iron main body. There are some C3 out there, You want to stay away from them if your using a V8.
     
  7. SlowandLow63
    Joined: Sep 18, 2004
    Posts: 5,958

    SlowandLow63
    Member
    from Central NJ

    Done, nuff said. For that matter, you can tell a C4 from anything. A C6 is a monster as compared to an AOD and an FMX is slightly smaller as well. Depends what you're looking at, it will narrow your options.
     
  8. Notorious
    Joined: Jul 18, 2007
    Posts: 393

    Notorious
    Member

    There are also C5s which look similar to a C4 but are a little stronger. They were used in some things later on, couldn't tell you in what though. I had one in a stout Cleveland powered '69 Mustang once but the drivetrain was not original.
     
  9. DirtyThirty
    Joined: Mar 8, 2007
    Posts: 2,396

    DirtyThirty
    Member
    from nowhere...

    from underneath, c-4 has a small, square pan...and removable bellhousing, as mentioned above. I think the pan looks similar on an fmx, if I remember right, but these have a cast iron housing, don't they? ( the fmx...?) the c-6 pan looks more like a chebby trans pan, with an indented area...not square.
     
  10. Deuce Roadster
    Joined: Sep 8, 2002
    Posts: 9,519

    Deuce Roadster
    Member Emeritus

    [​IMG][​IMG]

    C-4 has 11 pan bolts :)

    [​IMG][​IMG]

    C-6 has 17 pan bolts ...
     
  11. k-member
    Joined: May 25, 2002
    Posts: 2,114

    k-member
    Member

    C5's were 82-86 and had the lock-up converter. Also some C4's have a pan fill and other have a case fill I think 1970 is when they changed.
     
  12. 56KUSTOM
    Joined: Apr 26, 2005
    Posts: 3,102

    56KUSTOM
    Member

    Thanks for your help guys!
     
  13. Lee Martin
    Joined: Jun 17, 2005
    Posts: 739

    Lee Martin
    Member

    Bolt both to a "built" big block.....the one that goes up in smoke is the C4

    -Lee
    www.atomicpinup.com
     
  14. DirtyThirty
    Joined: Mar 8, 2007
    Posts: 2,396

    DirtyThirty
    Member
    from nowhere...

    lots of folks running 'em behind big blocks, nowadays...less parasitic loss. A hardened input shaft, and a good build, and it will take it.
    not out of the box, maybe...but, a good trans., easily built to handle power.
     
  15. Lee Martin
    Joined: Jun 17, 2005
    Posts: 739

    Lee Martin
    Member

    "lots of folks running 'em behind big blocks, nowadays...less parasitic loss. A hardened input shaft, and a good build, and it will take it.
    not out of the box, maybe...but, a good trans., easily built to handle power"

    Actually, I agree and if they're built, C4's hold-up pretty good. The same can be said for TH350s on the Chevy side.

    -Lee
    www.atomicpinup.com
     
  16. UnIOnViLLEHauNT
    Joined: Jun 22, 2004
    Posts: 4,827

    UnIOnViLLEHauNT
    Member

    There are more than a couple Ford trannies w/ detachable bells, case in point the FMX is visually close, but dimensionally different.
     
  17. SlowandLow63
    Joined: Sep 18, 2004
    Posts: 5,958

    SlowandLow63
    Member
    from Central NJ

    It just really depends what he's lookin/around. Once you get into the later years, FMX, AOD, AODE, and all that ****, there are more with detachable bells. I was thinking he was looking more towards 60's early 70's. In which case the C4 weas the only one w/ a detachable bell no?
     
  18. 56KUSTOM
    Joined: Apr 26, 2005
    Posts: 3,102

    56KUSTOM
    Member

    You're right ,I'm looking at '60's ones.
     
  19. Crosley
    Joined: Mar 3, 2001
    Posts: 1,138

    Crosley
    Member
    from Aridzona

    no..... Ford used the FMX trans into the early - mid 1970's. Bell housing bolted on... center section of main case would be cast iron though.

    :cool:
     
  20. UnIOnViLLEHauNT
    Joined: Jun 22, 2004
    Posts: 4,827

    UnIOnViLLEHauNT
    Member

    Nah, a bunch of ****. FMX, C4, Cruiseomatic, I think Fordomatic was an integral bell. Lemme think what else...Hydramatic (a tad earlier) behind the Linc Y blocks...prolly some other stuff. FMX was 70s tho.

    AOD line is one piece case tho, E etc as far as I know.
     

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