Register now to get rid of these ads!

Technical Hemi flywheel, Ford Clutch problem

Discussion in 'Traditional Hot Rods' started by oj, Apr 30, 2020.

  1. oj
    Joined: Jul 27, 2008
    Posts: 6,257

    oj
    Member

    I've got a mismatch somewhere, I have a hemi flywheel that I drilled for an early Ford 11" disc & Pressure Plate - I am mating a '40ish Ford toploader to the hemi.
    When I assemble and draw the PP down tight it collapses the springs near coil bind and the fingers are drawn way down to almost straight.
    Its almost as if the Ford flywheel had a pocket the disc sits in. 006.JPG
    You can see the springs and fingers in this picture. This is a Ford clutch, right for the year of the transmission.
    Any thoughts? Machine spacers to move the PP out? Machine a pocket into the flywheel? a little of both?
    I posted this over in the Ford Barn as well, they say the Ford flywheel is flat, no pocket.
    Thanks, Oj
     
  2. sliceddeuce
    Joined: Aug 15, 2017
    Posts: 2,982

    sliceddeuce
    Member

  3. oj
    Joined: Jul 27, 2008
    Posts: 6,257

    oj
    Member

    HolyShit! is that the original Ford flywheel & clutch setup?
     
  4. The guys on the Barn are right .

    Are you sure you have a Ford pressure plate ?
    All of the Ford stuff I have seen are the Long style PP s .
    The pic from deuce looks like a Borg and Beck style .
    But,,I have never seen a flywheel cut like that,,,,and the disc looks super thick .
    Heavy truck application maybe ?

    Tommy
     
    Last edited: Apr 30, 2020

  5. Check the disk thickness. I had the same problem on an OT MoPar that the rebuilder used linings that were too thick.
     
    oj likes this.
  6. Andy
    Joined: Nov 17, 2002
    Posts: 4,719

    Andy
    Member

    Looks like a 32-34 flywheel.
     
  7. oj
    Joined: Jul 27, 2008
    Posts: 6,257

    oj
    Member

    Yes, its a Ford 81T-7550 disc & 51-7563 PressurePlate; '39-46 1/2ton pickup & others according to the Green Book
    I emailed the people I got it from and will post what they have to say.
     
  8. rusty valley
    Joined: Oct 25, 2014
    Posts: 2,446

    rusty valley
    Member

    the flywheel sliced deuce shows is the early style, 9". but thats not what the op has. we need a better picture
     
  9. sliceddeuce
    Joined: Aug 15, 2017
    Posts: 2,982

    sliceddeuce
    Member

    O.J. That is V-8 60. I just wonder if you have the parts you think you have.
     
  10. oj
    Joined: Jul 27, 2008
    Posts: 6,257

    oj
    Member

    I confirmed that I do have the 11" Ford, the part numbers are correct. The people that made it sent this pic of the original Ford flywheel showing the recess for the disc:
    [​IMG]
    The disc sits in that 2nd 'ring', all he had was a picture and unable to give a measurement but I can play with shims on the PP to achieve the same, the heartburn will the the shoulder of the PP bolt, they extend thru the PP into a counter sunk hole before the threads start. I set them .100 deep into the flywheel, aircraft bolts (-AN Bolts or NAS bolts) are ordered by the shoulder & thread length. They are appropriately salty.
    It looks like I have a direction to go in, we'll see what happens next.
    This hot rodding stuff sure is fun, ain't it?
     
  11. That’s the back side of the flywheel !
    We need some pics of what you have,,,,,and if they built the clutch to fit that flywheel,,,,,,that could be some of the problem .
    Tommy
     
    Last edited: May 1, 2020
    seb fontana likes this.
  12. saltflats
    Joined: Aug 14, 2007
    Posts: 10,691

    saltflats
    Member
    from Missouri

    That looks like the engine side of a flywheel to me.
     
    ottoman and Desoto291Hemi like this.
  13. x3, wrong side!
    OJ, take YOUR setup apart and post pics so we know what you have!
     
    73RR and Desoto291Hemi like this.
  14. When I get into the shop I'll look at both Hemi and Flathead flywheel for ya and post up photos. You may have the center of the Disc hitting the Flywheel blots holding the Disc forward not letting the Fiber of disc seat flat on the disc surface of Hemi flywheel. Some modeling clay on the bolt heads and match back side of damper springs will answer that question for sure. According to top photo everything looks correct and you should not need any spacers between Flywheel and PP.
     
  15. Most flywheel to crank bolts have a short head on them. If you used standard hardware store bolts the head can cause problems. I'll be back.
     
  16. oj
    Joined: Jul 27, 2008
    Posts: 6,257

    oj
    Member

    I believe you guys are right, it must the motor side.
    Can't take it apart right now, I stuck the trans back in it so I can set the chassis back on the ground and swap places in the shop.
     
  17. patsurf
    Joined: Jan 18, 2018
    Posts: 467

    patsurf

    this is starting down the same road as the man a fre setup on the yellow coupe.....
     
    Desoto291Hemi likes this.
  18. oj
    Joined: Jul 27, 2008
    Posts: 6,257

    oj
    Member

    I appreciate that. I tapped the hemi crank so the bolts go thru from the front and used the ARP large headed 426 hemi flywheel bolts. I had measured everything very carefully because I had to make my own pilot bushing. This picture is from when I tapped the holes for the PP, you can see the machining for the crank bolt heads 084.JPG
    I looked to see if I had a pic of the flywheel bolted up and the pilot bushing in place but don't have one.
    The disc isn't touching anything and rotated free with the alignment tool when installing the PP.
    I had to stick the trans back in so I can roll the chassis around in the shop and swap places with another car, be able to take it apart tomorrow.
     
    RMR&C and Desoto291Hemi like this.
  19. The Hemi flywheel looks good,,,,,,what model is the Hemi flywheel,,,,does it register on the crank flange ?

    Tommy
     
  20. oj, my idea don't hold water in your case. Yes the photo of the Ford flywheel you posted is of the Back side.
    20200501_072223.jpg 20200501_072239.jpg 20200501_072250.jpg
    Both the Ford and Hemi units are much the same and the Hemi actually has a much deeper cut center relief. Contact is not your problem. Thinking about it all, are you sure you even have a problem? It don't take much movement at the contact point of fingers and bearing to release the disc. I'd put it back together with trans on and depress the Clutch arm and see if I can turn the tailshaft with it in a gear. Past that either the disc or cover must be built wrong. Shims should not be necessary.
     
  21. Going back to the 1st post,,,,the first pic .
    The disc is turned the right way,,,right ?

    Tommy
     
  22. oj
    Joined: Jul 27, 2008
    Posts: 6,257

    oj
    Member

    Thanks for taking the time to dig the stuff out and post pictures, very good of you.
    I have it together now and the TO has 1/2" or more freeplay and it is solid when you try to disengage the clutch - I'd break something before it moves.
     
    Just Gary likes this.
  23. oj
    Joined: Jul 27, 2008
    Posts: 6,257

    oj
    Member

    It is 354 hemi, it fits tight on the crank flange, a proper Chrysler fit.
    To answer your other question, yes the disc is facing the only way it can go, the splines have to be outboard for the input shaft - remember the adapter moves everything back a good ways. Its an old Offenhauser piece that I did not get any stuff that would have come with it to make it all work.
     
    Desoto291Hemi likes this.
  24. Fordors
    Joined: Sep 22, 2016
    Posts: 3,467

    Fordors
    Member

    Judging by Post #18 this guy has been around the block more than a few times, I think he knows what he’s doing.
     
    Last edited: May 1, 2020
    RMR&C and oj like this.
  25. oj
    Joined: Jul 27, 2008
    Posts: 6,257

    oj
    Member

    Thats the problem: he (me) thinks he knows what he's doing!
    LoL
     
  26. KenC
    Joined: Sep 14, 2006
    Posts: 571

    KenC
    Member

    Post 5 sounds very likely. Any reproduction or rebuilt is always suspect as to materials and dimensions.
     
  27. I'll go measure a 40 PP and give you the set back of the face of plate to flywheel cover at the flywheel. Maybe there's something there that isn't correct.
     
  28. I have both a Borgue & Beck style as well as the Ford style. I laid a strait edge on the Bolt pad and used dial indicators to measure the Gap. Ford style is new.
    20200501_151649.jpg 20200501_152012.jpg
    Borgue & Beck style is used.
    20200501_151709.jpg 20200501_152019.jpg
    I don't have a new disc today but will on Sat. My used disc that I would say is 50% and usable is .340 thick. The new one may be somewhere in the .400 to .450. If your numbers are anywhere close to what I posted up I would be thinking the PP may have been put together with the wrong springs.
     
    oj likes this.
  29. sliceddeuce
    Joined: Aug 15, 2017
    Posts: 2,982

    sliceddeuce
    Member

    This is a Wilcap..But.. 392efmdiagram.jpeg
     
  30. Bullit68
    Joined: Sep 16, 2009
    Posts: 140

    Bullit68
    Member
    from Verona, PA

    Hmm.. Dodge pressure plate and Ford disc for the trans spline....
     

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.