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Gold Hills Posse 4×4 Club · Folsom, CA

JK's on 37's or Bigger with D44's What are You Running for Caster?

  1. Nubby Webmaster K6NUB Joined: February 2018
    #112 Dec 2021, 11:22 PM

    Hey all, since I went to the 37's on my rig I feel like the steering has got a bit flighty and does not want to re-center. I've read a little bit and I am seeing some pretty big swings in what folks are running for caster which sounds like could be the culprit. My lift recommended 5-6 degeees which is where I am at, mid-high 5's. I have heard some folks talking about up to 10 which sounds like a ton. What are you running?

    I have checked all suspension componenets and everythig looks solid so I don't think there is anything going on there. WHen I have some time I might just increase it a bit and see what happens, but would be curious to see what others are running.

    Jamie & Damaris
  2. Specialsoundman Member Joined: January 2013
    #213 Dec 2021, 12:27 AM

    I could not resist........powertec-caster.jpg

    • powertec-caster.jpg
    David and Lori
  3. JohnDF Member Joined: July 2003
    #313 Dec 2021, 9:33 AM

    My old JK lift had pre-set control arms, so I'm not even sure what the castor was set at. But the company did a good job of dialing-in the correct measurements because I never had a steering issue on my D44. The steering components were all beef too, which probably helped a little too. Sorry I'm not much help.

    I used to wheel a lot. . .
  4. kris_olof Trailmaster Joined: October 2015
    #418 Dec 2021, 11:00 PM

    How close is your pinion to pointing at the T-case output?  If it is already a little low then might not have much room for adjustment.  In TJ land 7-10 was ideal but the JK is a more refined suspension so shouldn't need as much. If you have enough pinion angle to work with I would bump it a degree or two and just see how it feels.

    Another option would be to borrow someone else's tires/wheels for a test.  Could just be the 37s don't want to be on the street and are telling you so.

  5. JohnDF Member Joined: July 2003
    #519 Dec 2021, 9:48 PM
    kris_olof said Another option would be to borrow someone else's tires/wheels for a test.

    Good point. I had a set of Toyo tires that wouldn't return to center and always felt like they wanted to wander.

    I switched tires and the problem went away. It's definitely worth a try before messing with angles and such.

    I used to wheel a lot. . .
  6. Nubby started this Webmaster K6NUB Joined: February 2018
    #620 Dec 2021, 5:34 AM

    I will check the relation from the pinion to the t-case, but the Ultimate Dana 44 is supposed to be caster corrected so I should have room. I was having the same thought, adjust it out a couple degrees and see how it feels.

    kris_olof said How close is your pinion to pointing at the T-case output?  If it is already a little low then might not have much room for adjustment.  In TJ land 7-10 was ideal but the JK is a more refined suspension so shouldn't need as much. If you have enough pinion angle to work with I would bump it a degree or two and just see how it feels.

    Another option would be to borrow someone else's tires/wheels for a test.  Could just be the 37s don't want to be on the street and are telling you so.

    Jamie & Damaris

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