T15 To Dauntless

Discussion in 'Flat Fender Tech' started by oldtime, Apr 10, 2017.

  1. Apr 28, 2017
    OzFin

    OzFin Vintage Jeep Guy

    Michigan
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    I almost cut them off my T-14 but was glad I didn't. I used the rear one to align & stabilize a bracket I made when I converted to a hydraulic clutch setup.

    [​IMG]

    [​IMG]
     
    Last edited: Aug 8, 2017
    ITLKSEZ likes this.
  2. Apr 28, 2017
    oldtime

    oldtime oldtime

    St. Charles,...
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    Interesting Oz,
    I guess I just ruined my chances for a hydraulic clutch. Ha Ha !
     
  3. May 1, 2017
    Keys5a

    Keys5a Sponsor Sponsor

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    Many, many years ago, when I swapped a Buick 215 in my Tux, I cut and re-positioned the flange on the stock cast iron exhaust manifold. My brother did the nickel electrode welding, and it turned out perfect. Many years of use, and I never had any issues. Cast iron welds quite nicely with the right rods.
    -Donny
     
  4. May 9, 2017
    OzFin

    OzFin Vintage Jeep Guy

    Michigan
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    I presume that you sent it out for surfacing...anything new to report?
    Oz
     
  5. May 9, 2017
    oldtime

    oldtime oldtime

    St. Charles,...
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    Right On Oz.
    I sent it down South to the EARLY CJ-5's FORUMS favorite machinist.

    Along with some other oddball Jeep jobs....
    I told Mike to mill the rear face flat to match the front face.
    Then align everything and enlarge the transmission face (rear) bore to fit the larger T-15 bearing retainer.

    I'll get you the latest update along with some finished product pics when it arrives back home.
     
  6. May 31, 2017
    Mcruff

    Mcruff Earlycj5 Machinist Sponsor

    Albertville, AL
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    I have the pilot bushings and the bearing retainer done. The adapter is almost finished. Should be tomorrow along with the gear. I will mail the parts back to you next monday or Tuesday. I have been so busy lately only working in the garage just a little bit.
    Here is your adapter, I had to remove .028" on this side to flatten it out.
    Finally go to use the rotary table I bought last summer. Its a small 6" table made in India, its not bad but its not really a great table for something this large in diameter, but it did work ok.

    Adapter before.JPG


    Adapter after.JPG
     
  7. Jun 1, 2017
    oldtime

    oldtime oldtime

    St. Charles,...
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    Yeah Mike no hurry here.
    Yeah that rotary table is pretty cool !

    I certainly did not anticipate so much warpage.
    But the exact thickness is not very critical anyway so I think were good to go.

    If you like that design then steal the dimensions and call it your own.....

    Thanks for the update.
     
    Last edited: Jun 1, 2017
  8. Jun 1, 2017
    OzFin

    OzFin Vintage Jeep Guy

    Michigan
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    Lookin good, nice work Mike.
     
  9. Jun 11, 2017
    mortten

    mortten Member

    Peninsula, Ohio
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  10. Jun 21, 2017
    oldtime

    oldtime oldtime

    St. Charles,...
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    Parts back home and here are the end results.
    Fresh rebuilt T 15 transmission weighs in at 75 pounds complete.
    If you look close you can see the end of the T 15 bearing retainer tube was turned down slightly near its end.
    This was done so it will accept the Dauntless T14 or common diameter GM release bearing carriers.
    [​IMG]

    Rebuilt T15 with customized Jeep adapter in place: weighs in at 85 pounds.
    Thickest portion of release carrier tube is mostly inside the adapter.
    Standard T 14 release carrier will slide back to the paint line.

    [​IMG]

    Side view with adapter plate and ready for GM engines:
    Was painted with 2K Nason and topcoat.
    The adapter turned out a little under target thickness so I placed a thick gasket between adapter plate and transmission to make it exactly 1.625".
    [​IMG]
     
    Last edited: Jun 21, 2017
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  11. Jun 21, 2017
    OzFin

    OzFin Vintage Jeep Guy

    Michigan
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    Looks good Ken.
    How much material was removed from the retainer tube to make it G.M. standard?
    Oz
     
  12. Jun 22, 2017
    oldtime

    oldtime oldtime

    St. Charles,...
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    Turn the release carrier sleeve O.D. down on the T-15 bearing retainer from .405 O.D to .377 O.D.
    This was done for a couple reasons.
    Mainly to keep things standardized.

    As previously mentioned the AA and the Trans-Dapt adapters both make use of the GM # 3741458 bearing retainer = 3-1/4" long " with 1.375" bearing sleeve.
    Jeep T 18 transmissions also have 1.375 O.D. carrier sleeves.
    Will be much easier to convert to the other adapters or to a T 18 if I make changes later on.

    T 15 may or may not be the ultimate CJ transmission depending on ones needs.
    T 15 is certainly the finest transmission that bolts up direct to Dana large hole transfer case having Texas pattern (circa 1962-1980).

    Most of you know all this but....One final thing I'll cover here is the crankshaft pilot bushing.
    The Dauntless will require installation of a custom pilot bushing.
    Standard Dauntless drive train requires .590" I.D. X 1.09" O.D. Oilite bushings.
    The T 15 transmission has a .750" pilot tip so a non standard bushing (having no Jeep part number) will be required.

    Two options... Recut the original oilite to .750" O.D. or else buy a custom sized bushing from AA or Novak.
    Here you see 4 different bushings.
    [​IMG]

    The 2 on your left are original take out Oilite bushings that have been re-cut to larger I.D.
    Note they have the typical yellow brass color.
    The 2 on your right are what Mcruff calls Super Oilite 16 and were sourced through Novak.
    Note they have more of a whitish color due to iron content.

    The 2 on the top are bored to .670" I.D. to fit T 18 transmission pilots.
    The 2 on the bottom are bored to 7.50" I.D. to fit T 15 transmission pilots.
    [​IMG]
     
    Last edited: Jun 23, 2017
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