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T14 Gears And Synchro's 1970 V6

Discussion in 'Early CJ5 and CJ6 Tech' started by VintageIron41, Mar 12, 2024.

  1. Mar 12, 2024
    VintageIron41

    VintageIron41 Member

    Dayton, OH
    Joined:
    Oct 30, 2022
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    91
    Hello and thanks for taking time to read this.

    Took the T14 and transfer case out of my 1970 Dauntless V6 CJ5 to try and finally find/repair the fluid leak.
    In looking at the transmission I see wear on the synchro's and on 2nd gear, having already bought the Novak kit with seals, brass synchro parts, roller bearings etc., is there a source for just the gear(s), and synchro assemblies with the plates but minus the brass parts I already have?

    Too, at some sites I see parts labeled by tag number for the same year range. the tag numbers on my Dana don't match those listed at the sites, all T14 internals are not interchangeable?

    Thank you!
     
  2. Mar 12, 2024
    jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Sheboygan
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    Jun 28, 2006
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    It may be worthwhile to have a shop smoke test after they seal it up. I removed the trans/tcase from the engine and "resealed" it 3 times, and finally took it to a shop. for 150 bucks, it hasn't leaked yet.
     
    Last edited: Mar 12, 2024
    Ol Fogie likes this.
  3. Mar 12, 2024
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
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    Jul 18, 2013
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    I think there are some minor differences between the early v6 (67-71) and intermediate I6 (72-75) T14s. Input shaft is different IIRC
     
    Ol Fogie likes this.
  4. Mar 12, 2024
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
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    8,535
    ..as well as the gears inside.
    They won't mix and match.
     
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  5. Mar 12, 2024
    colojeepguy

    colojeepguy Colorado Springs

    At the foot of...
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    Personally I would try to find used parts if you need hard parts like gears or shafts. I'd trust 50 year old OE gears before aftermarket parts made in China.
    You could start with a WTB (want to buy) ad in the classified section here. Lots of T14s have been swapped out for 4 speeds so someone should have something.
     
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  6. Mar 12, 2024
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
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    just come on up to MT when you are ready to do mine....you are all experienced at it now
     
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  7. Mar 12, 2024
    colojeepguy

    colojeepguy Colorado Springs

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    Yeah, I already made all the mistakes! :lol:
     
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  8. Mar 12, 2024
    CJ51973

    CJ51973 Member

    Versailles, KY
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    Nov 6, 2009
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    Just pulled my T14 working unit out last weekend for a SM420 swap.
     
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  9. Mar 12, 2024
    Mr_Vaughan

    Mr_Vaughan New Member

    Central City, NE
    Joined:
    Apr 26, 2023
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    How bad are the parts? unless there's severe wear/damage or the transmission was acting funny beforehand, I can't imagine the gears or synchro hubs would need replaced. do you have any pictures of the damages parts in question?
     
    Ol Fogie likes this.
  10. Mar 13, 2024
    VintageIron41

    VintageIron41 Member

    Dayton, OH
    Joined:
    Oct 30, 2022
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    Thank you all for your replies! The leak is the main priority, you do have to keep rpm down low to shift from 1st to 2nd, or to downshift from 3rd, or its grinds. The synchcro assemblies ( not the brass ) and the plates in them have rounded edges, the gears themselves have some rounded edges and burrs, I think the shifting to 2nd issue is synchro related. Are the synchro assemblies also made in China?
     
    Fireball likes this.
  11. Mar 14, 2024
    jeepdaddy2000

    jeepdaddy2000 Active Member

    Eagle Point oregon
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    Jun 24, 2004
    Messages:
    1,259
    This is synchro related. Replacing them should fix the issue.
    A couple of pictures of the offending parts may help us.
     
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