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Technical 1939 Ford transmission main shaft extender

Discussion in 'Traditional Hot Rods' started by indianapolisracer, Jan 9, 2019.

  1. indianapolisracer
    Joined: Feb 9, 2011
    Posts: 171

    indianapolisracer
    Member

    Installing a 1953 Oldsmobile engine in my 1939 Ford utilizing an adaptor plate to attach a 39 transmission to the Oldsmobile engine . A mainshaft extender is required to adapt the trans input shaft to the back of the Olds . Where can I acquire one of these extenders ?
     
  2. BJR
    Joined: Mar 11, 2005
    Posts: 9,915

    BJR
    Member

    Don't you use an extended pilot bushing?
     
  3. indianapolisracer
    Joined: Feb 9, 2011
    Posts: 171

    indianapolisracer
    Member

    No it is my understanding the trans main shaft must use an extender to fill the gap created by using the adapter plate
     
  4. I don't have any first hand answers for ya but need to hear the correct answer to your question. I've never heard of extending the shaft on any adaption, only bringing the pilot bushing to the shaft. In fact I have made spacers to go between the Crank and Flywheel to bring the disc to proper engagement on the spline. I actually have this project on the shelf for a project down the road.
    The Wizzard
     

  5. 51504bat
    Joined: May 22, 2010
    Posts: 4,797

    51504bat
    ALLIANCE MEMBER

    Maybe check with Wilcap in Pismo Beach, CA?
     
  6. King ford
    Joined: Mar 18, 2013
    Posts: 1,477

    King ford
    Member
    from 08302

    I think they sell them in the same store with tripe traps and left hand wind switch'es...
     
    Texas Webb likes this.
  7. Atwater Mike
    Joined: May 31, 2002
    Posts: 11,624

    Atwater Mike
    Member

    There was a part that was required on my old long bell Chrysler 331 Hemi that pressed into the crank, and positioned the pilot bushing further back...It was made from a piece of steel bar, 2" O.D.; then bored inside to 5/8" (+) and the front half turned down to the Chrysler crank I.D., around 1" O.D. Don't quote me on specs, but that was its general shape.
    I think I got it from Sid Waterman, long ago; 1962. (Speed Inc., San Jose)
     
  8. 63galaxie406
    Joined: Nov 21, 2018
    Posts: 47

    63galaxie406

    It’s called a pilot bearing adapter. It’s a press fit in the crank. Advance Adapters in Paso Robles, CA and Wilcap in Pismo Beach or Grover Beach, CA sells them.
     
    302GMC likes this.
  9. indianapolisracer
    Joined: Feb 9, 2011
    Posts: 171

    indianapolisracer
    Member

    Thanks for that
     
  10. BJR
    Joined: Mar 11, 2005
    Posts: 9,915

    BJR
    Member

    The whole adapter is here; http://www.wilcap.com/olds.html
    You can see the extended pilot bushing in the plastic bag pictured, just scroll down the page a bit.
     
  11. indianapolisracer
    Joined: Feb 9, 2011
    Posts: 171

    indianapolisracer
    Member

    Big help thanks
     
  12. FOURTYDLX
    Joined: Feb 22, 2006
    Posts: 718

    FOURTYDLX
    Member

    I hope you have a lot of trans parts, ask me how I know.
     
  13. When I had the 303 Olds. with a 37 tranny , it would blow the gears out of bottom of case.
     
  14. manyolcars
    Joined: Mar 30, 2001
    Posts: 9,194

    manyolcars

    I destroyed lots of 39 transmissons., Even after I learned to go easy on them. And that was with a puny flathead v8
     
  15. indianapolisracer
    Joined: Feb 9, 2011
    Posts: 171

    indianapolisracer
    Member

    Well what can I say , operator error ?
     
  16. indianapolisracer
    Joined: Feb 9, 2011
    Posts: 171

    indianapolisracer
    Member

    Ross racing engines has the part I need and is on its way , problem solved Thanks to all sincere replies ,jokers not so much !
     
  17. Put a stronger tranny in it - please! :)
     
  18. 302GMC
    Joined: Dec 15, 2005
    Posts: 7,875

    302GMC
    Member
    from Idaho

    When I was 15, I bought a pretty decent '46 Ford, stock as a stove …. drove over to my buddy's house to show off … wound 'er up & dumped the clutch. The whole bottom half came out in one chunk.
     
    Hank37 likes this.
  19. Final answer was as I would have expected. It's good to know for sure instead of getting ready and learning I need a difficult to find item. As we learn as we get older everything has a braking point, even the Stronger parts. Standing the test of time gets down to Not being a bone head Kid. As usual the H.A.M.B. comes through with info from those that know as well as the crowd in the Bleachers with there wealth of knowledge. I just love this place.
    The Wizzard
     
  20. Fred A
    Joined: May 3, 2005
    Posts: 290

    Fred A
    Member
    from Encino, CA
    1. Upholstery

    Before I was drafted in '66, my then '40 coupe was fitted with a post war Zephyr OD trans in front of 4.44 V8-60 gears. That was clearly the best gearing for my Olds power. Great from start to highway cruising. People thought that I had a four speed, will in a way it was. Took a while to understand how to do a Ford trans and rear to avoid breakage. 27 months in Asia made keeping the car out of the question. Fifty years later there's a great'40 project in my yard. It's beyond good to be back. Good Luck: Fred A
     
  21. junkman8888
    Joined: Jan 28, 2009
    Posts: 1,035

    junkman8888
    Member

    Indianapolisracer, please listen to these guys: Bought a 53-56 Buick nailhead at an auction a few years back for the Offenhauser manual transmission bellhousing, flywheel, clutch and pressure plate. When I pulled the cover on the transmission (a next generation '49 and later Ford) I found the teeth completely stripped off of the cluster gear, when I pulled the bellhousing and pressure plate the clutch disk still had the paint ID legible on the clutch surface. In other words, they dumped the clutch once and it was toast, frankly, with the parts your're using you're not going to have any better luck.
     
  22. I ran an Olds in my 36 couple in 58.
    Just made sure rolling before dropping the hammer. Only changed one transmission. It would pop out of second gear.
     

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