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1991 YJ Lift Height

Discussion in 'Wrangler YJ (1986-1995)' started by 91-Jeep-YJ, Nov 10, 2019 at 6:36 AM.

  1. Nov 10, 2019 at 6:36 AM
    #1
    91-Jeep-YJ

    91-Jeep-YJ [OP] New Member

    Joined:
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    Gender:
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    First Name:
    Mike
    Vehicle:
    1991 Jeep Wrangler YJ
    4 inch lift
    Bought a 91 YJ and I'm trying to determine what the lift is over stock. It definately has a kit on it and I think it's a 4" but I want to be sure before doing anything on the suspension. Does anyone knows how to take some simple measurements to determine this. Thanks!20190609_081314.jpg
     
  2. Nov 10, 2019 at 3:30 PM
    #2
    Jim Beam

    Jim Beam Well-Known Member

    Joined:
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    Donald
    Vehicle:
    1986 CJ7
    Fuel Injection, Dana 44s, T18, 4.10s w/lockers
    The YJ lift kits usually come in two sizes, 2 1/2" and 4". You have a 4", probably. Check for any info printed on the springs along with a transfer case drop kit and wedges between the axle mounting pads and the leafs. That's a pretty tall spring shackle lift you have there. Are you getting any bump steer or vibrations while driving?
     
    aggrex and JKBob 25 like this.
  3. Nov 10, 2019 at 4:02 PM
    #3
    91-Jeep-YJ

    91-Jeep-YJ [OP] New Member

    Joined:
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    Messages:
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    Gender:
    Male
    First Name:
    Mike
    Vehicle:
    1991 Jeep Wrangler YJ
    4 inch lift
    Thanks for the response. I was thinking it was a 4". It seems to have all of the parts you mentioned. I'll have to look for info on the springs.
    Yes.......The steering is a little squirrelly but I'm so used to it now that it's not as noticable as it used to be. I did some minor stuff like rebuild the steering column which freed up the steering some. Was acting like it was trying to lock up. Greased everything. Made sure all drivetrain fluids were full. Also adjusted the steering gearbox and that made a big difference. I'm concerned that the track bar may be wrong. I've read that anything over a 4" lift should have an adjustable track bar. This one is not adjustable. The big question is.....should it be adjustable or not?
     
    JKBob 25 likes this.
  4. Nov 10, 2019 at 8:13 PM
    #4
    JKBob 25

    JKBob 25 Well-Known Member

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    Bob
    Jersey Shore, NJ
    Vehicle:
    2016 JK Wrangler Sport
    2" Superlift kit. 315/ 70/17.
    Yes....you should install an adjustable track bar. It will realign your body with your chassis. And, probably all but eliminate that squirrelly feel. But there are other issues with a lift. Control arm length become an issue.
    As a rule of thumb. Your drag link and track bar should be parallel. Good place to start.
     
    aggrex likes this.
  5. Nov 11, 2019 at 12:52 PM
    #5
    Jim Beam

    Jim Beam Well-Known Member

    Joined:
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    241
    Gender:
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    First Name:
    Donald
    Vehicle:
    1986 CJ7
    Fuel Injection, Dana 44s, T18, 4.10s w/lockers
    When you make a right or left turn, let go of the steering wheel and it should return to center. With a lift such as yours the caster alignment has been affected, look it up. When guys put a lift as tall as a 4" on a CJ or YJ, it really affects a lot of other stuff. When I did mine, it required the axle mounting pads to be rewelded to correct the pinion angles and caster alignment. plus I installed a constant velocity u-joint assembly. I do not have any transfer case drop either, gotta clear those rocks.
     
    JKBob 25 and aggrex like this.
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