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Dana 20/t-15 Bolt Up

Discussion in 'Intermediate CJ-5/6/7/8' started by Allan, Jan 5, 2020.

  1. Jan 5, 2020
    Allan

    Allan Member

    Olympia
    Joined:
    Jan 21, 2019
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    177
    So a bit of a problem, I am bolting the transfer case to the t-15 and the tighter I bolt them together the less the transmission will move in neutral, I can stop it from moving when fully torqued
     
  2. Jan 5, 2020
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
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    Aug 10, 2003
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    Did you take the T-15 apart? How about the transfer case?
     
  3. Jan 5, 2020
    Allan

    Allan Member

    Olympia
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    Jan 21, 2019
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    177
    Both, transmission doesn’t turn freely in every gear
     
  4. Jan 5, 2020
    Allan

    Allan Member

    Olympia
    Joined:
    Jan 21, 2019
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    177
    Transfer case turns in all gears like it should, linkage a little tight but I think expected till gear oil really gets moving in it?, I don’t have a diagram of the t-15, can’t find one anywhere, used the t-14, seemed pretty similar
     
  5. Jan 5, 2020
    Allan

    Allan Member

    Olympia
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    Jan 21, 2019
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    I can’t understand how I can put it in neutral, and a couple gears and it works fine, just not all
     
  6. Jan 5, 2020
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
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    What year is your Jeep? You should put the year and equipment in your signature file so that it's present for every post. It almost always matters. Some TSMs lump the T-14 and T-15 together. The '77 or '79 TSM on the www.oljeep.com site will show the T-15 by itself, but that's mostly because the T-14 was gone by then.

    When you say couple of gears, which gears exactly? Does the countershaft turn?

    Just off-hand, if tightening the transfer case to the transmission freezes everything, I'd think the overall length of the mainshaft or input shaft is wrong because of either wrong parts or improper assembly. What did you replace, and who supplied the parts?
     
  7. Jan 5, 2020
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Sep 23, 2002
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    11,595
    Something in the transmission either not fully seated, assembled reversed like a synchronizer assembly, or the rear bearing spacer installed in the wrong spot. Been a long time since I’ve been in a T-15 so the last may not apply, but I know it does in T-14’s,T-90’s, T-86’s, etc.
    one of the pocket needle bearings between the input and output out of place can cause the output to be pushed too far back and cause it as well.
     
    Twin2 likes this.
  8. Jan 5, 2020
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2020 Sponsor 2019 Sponsor

    cordele, Ga.
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    [​IMG]This is T-15
     
  9. Jan 6, 2020
    Allan

    Allan Member

    Olympia
    Joined:
    Jan 21, 2019
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    177
    1974, Countershaft turns great, I can put it
    Everything thing “seems” correct! It’s just like the shifter isn’t in the right place when you go through the gears, moves around great, the main shaft just doesn’t turn in most shift positions. I stumbled across a note in the TSM, says that the snap rings for the main shaft bearing snap ring is 0.010 thicker than the main drive gear bearing snap ring. Could that cause the problem? Almost seems like the main drive gear bearing may not be pressed on all the way, it seems like the bearing cap is as close to the transmission as it can be, maybe it just seems that way? Your needle bearing suggestion that one may have fallen out and is stuck in the end of the front output shaft, would that not let the transmission seat all the way into transfer case? Cause it not to turn? And furthermore not allow for the transmission to shift in all gears?
     

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