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

Shackle Reversal

Discussion in '40- & 55-Series Tech' started by Lt1FJ40, Oct 10, 2003.

  1. Lt1FJ40

    Lt1FJ40

    Messages:
    60
    Likes Received:
    0
    Joined:
    Jul 30, 2003
    Location:
    Edmonton Alberta
    I am looking at doing a custom shackle reversal on my 73 FJ40. Now from what I read some people put the short part of spring in the front and others put the longer part of the spring in the front and extend the frame alittle. Which is the right way or better way?

    BTW this is a daily driver.

    Thanks
    Rob.
     
  2. Corbet

    Corbet Speski OffRoad LTD. Supporting Vendor

    Messages:
    4,017
    Likes Received:
    965
    Joined:
    Oct 22, 2002
    Location:
    Durango, Colorado
    Long part forward is correct. People switch it to get longer wheelbase. You need to be aware of pinon angle when you do this, longer driveshaft, probably some sterring modifications. It is probably more commonly done in the rear.
     
  3. willsta2000

    willsta2000

    Messages:
    146
    Likes Received:
    0
    Joined:
    Sep 26, 2002
    Location:
    Yakima, WA
    The long part of the spring should stay with the shackle,... that's the part of the spring you want to flex the most. So if you do a shackle reversal, the long part of the spring should face rearwards. The frame extentions you read about are probably someone putting FJ 55 springs in (they're longer, thus they decided they wanted to extend the frame).

    Hope this helps
    WILL
     
  4. fj40mayo

    fj40mayo

    Messages:
    402
    Likes Received:
    0
    Joined:
    Aug 11, 2003
    Location:
    Fort Worth
    IIRC, you should reverse the 2nd leaf, the one that attaches to the shackles. The rest of the leaves stay the way they were. When you reverse the 2nd leaf, you will have to re-drill the spring pin hole so it will be centered with the others.