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Prop Shaft U Bolts Mismatch

Discussion in 'Flat Fender Tech' started by Mark Andrews, Nov 4, 2019.

  1. Nov 4, 2019
    Mark Andrews

    Mark Andrews New Member

    Pennslvaniasena
    Joined:
    Aug 24, 2017
    Messages:
    5
    The Spicer 25 front axle in my CJ3A has been replaced with a 27A from a l969 CJ5. Unfortunately the prop shaft U bolt flange with bolt holes CtoC 1-3/8" & 2-7/8" on the prop shaft used with the 25 are not compatible with the pinion flange U bolt holes 1-3/8" & 2-1/4" on the 27A
    Has anyone solved this mismatch problem, and how? PN(s) and source(s)? Thank you
     
  2. Nov 4, 2019
    47v6

    47v6 junk wrecker! Sponsor

    Washington DC.
    Joined:
    Oct 25, 2006
    Messages:
    4,599
    You're gonna need a new yoke. How many splines are on the D27? You may be able to swap them if they are the same spline count.
     
  3. Nov 4, 2019
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member Sponsor

    Denver, CO
    Joined:
    Jul 18, 2013
    Messages:
    2,400
    Yea - the D27 is probably from a v6 cj - the u-joints were made a bit smaller. There are yokes you can buy that will work...I'd check the D18 end of the driveshaft as well, as I believe that will be the small ujoint as well, and might not fit with a 4cyl D18.
     
    47v6 likes this.
  4. Nov 4, 2019
    todd hofsaess

    todd hofsaess New Member

    iowa
    Joined:
    May 5, 2018
    Messages:
    16
    i had the same issue and fellow member mtnmax had a post about northern drivetrain. they make 1310 yokes with a 26 spline shaft for the d27
     
    FinoCJ likes this.
  5. Nov 4, 2019
    nickmil

    nickmil In mothballs. Sponsor

    Happy Valley, OR
    Joined:
    Sep 23, 2002
    Messages:
    11,455
    You need a 27 yoke from an IH Scout 80. They used 27’s front and rear with the Spicer 153 U-joint (the larger one you are looking for). ‘62 to around ‘66 with the 152 slant four engine. The 27 was a unique depth and spline count combination that no other yoke will replicate despite what some will say.
     

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