71 fj40 aftermarket birfeilds?

Discussion in '40- & 55-Series Tech' started by godzilla, Apr 24, 2003.

  1. godzilla

    godzilla

    Messages:
    254
    Likes Received:
    0
    Joined:
    Apr 20, 2003
    I have a 71 fj40 and am swapping mini truck knuckles to get disc brakes, while I have the axle apart, I wanted to put marfeild or newfeild birfeilds in, but they only have them for the fine spline 75 and up . Has anybody done this before and have any solutions for me? Also should I change to 4:88 gears, while I have the axles apart? I'm going to run 39.5 swampers, and I'm running a 350 small block, sm465, and a toyota 3 speed transfer case. Thanks
     
  2. woody

    woody unhelpful spotter Staff Member Admin

    Messages:
    10,831
    Media:
    317
    Albums:
    8
    Likes Received:
    2,572
    Joined:
    Jan 15, 2002
    Location:
    Toquerville UT
    an automatic update when you do discs from a minitruck is th then run the mini birfields and lockouts. Longfields are a natural update from there.

    The coarse spline units you took out are now "useless", but worth $25 to a desparate soul on the trail.

    FJ40 inner axles from 1971 will work with minitruck birfs or Longfields.
     
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.