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Technical adapting later ford flathead to early trans

Discussion in 'Traditional Hot Rods' started by 3desotos, Mar 9, 2014.

  1. 3desotos
    Joined: Aug 8, 2007
    Posts: 54

    3desotos
    Member

    i am putting together a 52 flathead v8 and a 1939 trans. i have a cast iron adapter to mate the two. it bolts fine to the back of the engine, but the dowels do not line up on the adapter to the trans. when i put one dowel in its hole, the other is about an 1/8 inch out too much. are there different adapters? i had tried a spare case i had,and same thing happened. adapter and dowels look fine. no cracks,and dowels look straight. any help would be appreciated. thanks..
     
  2. Get a stock bellhousing for '49-'51 Merc.
     
  3. ned5049
    Joined: May 9, 2009
    Posts: 413

    ned5049
    Member

    I've got a 49 Merc bellhousing, if that will work for you.
     
  4. yard man
    Joined: Jul 19, 2006
    Posts: 94

    yard man
    Member

    Are you using the removeable bellhousing / adapter from the F1 pickup? Or aftermarket?
     

  5. 3desotos
    Joined: Aug 8, 2007
    Posts: 54

    3desotos
    Member

    i bought it here years ago. not sure what its off of.
     
  6. V8 Bob
    Joined: Feb 6, 2007
    Posts: 2,966

    V8 Bob
    ALLIANCE MEMBER

    The pictures below are the '48-'52 truck cast iron 1/2 bell.

    [​IMG]

    [​IMG]
     
  7. 1941coupe
    Joined: Jul 4, 2010
    Posts: 424

    1941coupe
    Member

    that should bolt right up iv done dozens,is the clutch aligned? if not it will not let the trans go in straight .the trans must be cocked it must be even all away around
     
  8. 3desotos
    Joined: Aug 8, 2007
    Posts: 54

    3desotos
    Member

    i am in the middle of mock up stage. there is no clutch in either of the trannys. they are just cases.
     
  9. 3desotos
    Joined: Aug 8, 2007
    Posts: 54

    3desotos
    Member

    that looks like the one i have.
     
  10. Ric Dean
    Joined: Dec 20, 2007
    Posts: 477

    Ric Dean
    Member
    from Central NY

    .. Pro Race engine builders center the bellhouseing from the center of the flywheel with a Dial Indicator. To correct any variations they use ‘offset dowels’ which are available, this also is a good way to get rid of clutch chatter.
     
    Last edited: May 25, 2014
  11. BillM
    Joined: May 26, 2007
    Posts: 247

    BillM
    Member Emeritus

    Are there dowels in the block that locate to the adapter?
     
  12. walter
    Joined: Nov 4, 2007
    Posts: 635

    walter
    Member

    49 merc make certian you get the starter plate and flywheel assemble. aqll just bolts togeather
     
  13. gearhead1952
    Joined: Dec 17, 2006
    Posts: 308

    gearhead1952
    Member

    That setup will work. Have that setup in my 34. What do you mean an 1/8 inch out too much?
     
  14. George/Maine
    Joined: Jan 6, 2011
    Posts: 949

    George/Maine
    Member

    If the half bell housing bolts to the block you may have a 6 cylinder trans case they are not the same as v8.
     
  15. gearhead1952
    Joined: Dec 17, 2006
    Posts: 308

    gearhead1952
    Member

    Not true. The trans are the same.
     
  16. V8 Bob
    Joined: Feb 6, 2007
    Posts: 2,966

    V8 Bob
    ALLIANCE MEMBER

    The '41-'48 round pattern 6 cyl. trans case is different than the V8s.
     
  17. flatoz
    Joined: May 11, 2003
    Posts: 3,237

    flatoz
    Member

    How about some photos? might help people guessing on what your working with and allow them/us to give you actual, factual information on what to do.

    At the moment were all just guessing at what you need to do and what you have.

    A couple of photos will help us help you.
     
  18. George/Maine
    Joined: Jan 6, 2011
    Posts: 949

    George/Maine
    Member

    I have a bell housing like post#6 and measured the pins center to center and little less then 12 5/16" when drilled may have been 12.300
    The 6 and v8 are not the same case.
    measure the trans case.
    I also think the bolt pattern is not the same.
     
  19. 51504bat
    Joined: May 22, 2010
    Posts: 4,755

    51504bat
    ALLIANCE MEMBER

    6 cylinder hogs head is different than the V-8. Also, the Merc stamped steel hogs head won't take an 11 inch clutch where a cast truck hogs head will. Don't ask me how I know.
     
  20. gearhead1952
    Joined: Dec 17, 2006
    Posts: 308

    gearhead1952
    Member

    You guys are going to have to prove it to me. According to Vanpelts book there were only three cases 18-7006, 48-7006 then 78-7006. I've taken quite a few trucks apart with 6s and 8s and only the bellhousing to block was different. Got a part number?
     

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