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T15 Rebuild

Discussion in 'Intermediate CJ-5/6/7/8' started by cj573, Jun 7, 2017.

  1. cj573

    cj573 Member

    I am rebuilding my t15. I read that there are 21 roller bearings in the input shaft ,when i put them in it looks like a space for 1 more. Should there be a space?
     
    cj573, Jun 7, 2017
    #1
  2. sterlclan

    sterlclan Member 2024 Sponsor 2022 Sponsor

    Don't know about a 15 but the kids 14 appears to have the same gap looked like one more would almost fit.
     
    sterlclan, Jun 8, 2017
    #2
  3. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Make sure you have the right part - Jeep PN 941659, replaced by 3208152. Parts book calls for 21 rollers. Test the fit of the input shaft to the main shaft with the rollers in place - should turn freely but not allow side-to-side movement. If you are missing a roller, it will be loose. I would expect using too many rollers would not allow assembly.

    Use this Amazon.com: Lubegard 19250 Dr. Tranny Assemblee Goo, Green, Firm Tack Lubricant, 16 oz.: Automotive to hold the rollers in place for a test assembly.
     
    timgr, Jun 8, 2017
    #3
    heavychevy likes this.
  4. FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    My Novak T14/15 rebuild guide shows 21 as well. As Tim says, make sure you have the correct roller bearings. I can't remember, are the main shaft and countershaft roller bearings the same?
     
    FinoCJ, Jun 8, 2017
    #4
  5. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Different. Different from the T-14 too. Jeep PN 991042, 44 required, so 22 at each end.
     
    timgr, Jun 9, 2017
    #5
  6. FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    So wondering if somehow the countershaft and mainshaft roller bearings have been mixed up?
     
    FinoCJ, Jun 9, 2017
    #6
  7. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Possible, but you can measure the rollers to see if they are all the same length and diameter, and not worn. An inexpensive micrometer like this Anytime Tools Premium 0-1" /0.0001 MICROMETER Precision Machinist Tool: Outside Micrometers: Amazon.com: Industrial & Scientific or even the digital caliper from Harbor Freight will clearly measure the diameters.

    I know the T-18 sometimes has a worn out pocket for the bearings in the input gear. This would increase the clearance for the rollers and make the fit sloppy. Not sure this is an issue with the 3-speeds, but you should be able to see wear in the pocket or on the end of the main shaft. You could also test the bearings for flatness using plate glass or a machinists ruler. However, this would also show up if you put the main shaft and input shaft together with the bearings between. It should be tight but turn freely.
     
    timgr, Jun 9, 2017
    #7
  8. jpflat2a

    jpflat2a what's that noise?

    If I recall the last roller has to be installed end first, not just pushing it in lengthwise.
    There should be no room or play between the rollers.
    The pilot rollers should be shorter, wider than cluster rollers.
     
    jpflat2a, Jun 9, 2017
    #8
  9. oldtime

    oldtime oldtime

    I just put new bearings in a guys T15 a couple weeks ago.
    I don't think you can mistake countershaft rollers for maindrive/mainshaft roller.
    The countershaft rollers are smaller diameter and requires 22 rollers on each end or 44 total.

    Best I recall, a qty of 21 seems correct for the maindrive/mainshaft.
     
    oldtime, Jun 9, 2017
    #9