1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Course or fine spline birf. for a 77' fj

Discussion in '40- & 55-Series Tech' started by Guest, Mar 17, 2003.

  1. Guest

    Guest Guest

    Do i need a course or fine spline birf. for my 77' fj40?
    Thanks
     
  2. Trevor

    Trevor

    Messages:
    883
    Likes Received:
    1
    Joined:
    Mar 11, 2002
    fine, assuming it's stock.
     
  3. woody

    woody Internet Fireman Staff Member

    Messages:
    10,332
    Media:
    303
    Likes Received:
    1,089
    Joined:
    Jan 15, 2002
    Location:
    Toquerville UT
    disc brakes, fine spline....and 76-78 were a slightly different birfield than the 79+/minitruck style. 76-78 have a slightly smaller bell diameter and a slightly longer shaft. 79+ birfs work, but you'll need to grind inside the knuckle a tad for the bell to fit and run a bolt/fender washer to hold it in the lockout instead of the c-clip at the end.

    IMO, you should do the mod anyways since the 76-78 birfs are much more rare than the 79-91 birfs used on FJ40-55-60-62 and minitrucks (which are ALL the same, at least in the USA....)