Power steering pump options

Discussion in 'KK General Discussion' started by Homeward_Bound, Aug 8, 2020.

  1. Homeward_Bound

    Homeward_Bound Member KJ Supporting Member

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    As the title suggests, would there be any pros in changing the Liberty 3.7 power steering pump with one from a heavier vehicle like the RAM 1500 with the 3.7? Got this idea from XJ guys using WJ steering pumps.
     
  2. lfhoward

    lfhoward Full Access Member

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    That’s a good question. Following this.
     
  3. LibertyTC

    LibertyTC Well-Known Member Staff Member Moderator

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    Is your current pump leaking, or just considering upgrade?
     
  4. Homeward_Bound

    Homeward_Bound Member KJ Supporting Member

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    Recently had it replaced under warranty. But when I had the radiator and fan shroud out, I got a good look at the front end. I'm setting up a phased plan approach to solid axle swapping my front end. This is just another proof of concept to perform because I don't think the KK spec pump would be up for the task.
     
  5. lfhoward

    lfhoward Full Access Member

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    The KK power steering rack seems to be a weak link. I remember several people on LOST who offroaded in CO, TX, TN, etc. replacing theirs multiple times, even getting to the point where they carried extra racks for trail replacement. One guy (Jeepincrowd) ended up doing a custom IFS job with JBA and something like a 6 inch lift.
     
  6. Homeward_Bound

    Homeward_Bound Member KJ Supporting Member

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    That turned out to be 10" of lift, custom RCV shafts, clocked t-case, ORI struts in the corners, custom cradle drop, 9" center section, repositioned gas tank, shaved WK knuckles... A lot more work and money than what I want to put in. Plus it was a one off build that Marlin does not want to do again.
     
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  7. rotary_powered

    rotary_powered New Member

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    While I can't recommend a different pump, I do have the specs for our pump out of the factory service manual that may be of some help. I would think they will have similar relief valve psi ratings, put may have a higher flow rate

    And yes, the stock power steering racks are weak. I've blown out 2 so far, but I'm nearly through rebuilding one.
     

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  8. Homeward_Bound

    Homeward_Bound Member KJ Supporting Member

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    Took a while, but found the Ram 1500 3.7 power steering pump spec. Using that pump gains upwards of 1 gpm at 1500 rpm as well as 100 psi for the operating pressure.

    Theory is now that the pump should bolt into the same mounts since the 1500 pump I referred to is from the same 3.7 engine. I wouldn't use it with the stock KK rack, but good info nonetheless.
     

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