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D27 F/R lever arm, What is it for?

Discussion in 'Early CJ5 and CJ6 Tech' started by Packer, Dec 31, 2004.

  1. Dec 31, 2004
    Packer

    Packer Slacker

    Livermore, CA
    Joined:
    Sep 16, 2004
    Messages:
    33
    Ok, I'm new to jeeps and still trying to figure how it all works. Yesterday I made my first trip to a jeep salvage yard near Sacramento, Wow was that lots of fun!
    (no I did not buy anything....yet!)

    My main purpose was to take pic's of specific jeeps to help me figure out how to properly restore mine. While there I took the following pic, and am wondering what the lever arm on the axle (with bumper) does/for/do as the later jeeps don't have it. My jeep does.


    Thanks for the Help!

    P.S. My manual wasn't informative at all, the picture breakout showed it, but had no description of it.
     
    Packer, Dec 31, 2004
    #1
  2. Dec 31, 2004
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Sep 20, 2002
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    9,221
    Looks like a bumpstop.
     
    sparky, Dec 31, 2004
    #2
  3. Dec 31, 2004
    Packer

    Packer Slacker

    Livermore, CA
    Joined:
    Sep 16, 2004
    Messages:
    33

    I agree, but what is confusing to me is that the distance from the bumpstop at the end of the arm is much less than the distance from the axle to the bumpstop on the frame. Maybe I'm trying to make it too complicated, But why have 2 bumpstops with different travel distances? Also it's only on the Front Right side? I'm sure I'm missing something obvious here and it will click soon.

    Thanks!
     
    Packer, Dec 31, 2004
    #3
  4. Dec 31, 2004
    Mcruff

    Mcruff Earlycj5 Machinist

    Albertville, AL
    Joined:
    Sep 22, 2002
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    5,349
    I think it was put on the v6 models only to keep the chunk out of the oil pan. I have never seen an original 4 cylinder model with this on it. I could be wrong but thats what I really think its for.
     
    Mcruff, Dec 31, 2004
    #4
  5. Dec 31, 2004
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Sep 20, 2002
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    That makes sense McRuff.
     
    sparky, Dec 31, 2004
    #5
  6. Dec 31, 2004
    Jeepenstein

    Jeepenstein Me like Jeep.. 2024 Sponsor

    North Central FL
    Joined:
    Jun 15, 2003
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    2,156
    mine has it too.. and actually the driveshaft hits the starter before it gets to the oil pan.. don't ask how I know...


    BUBBA
     
    Jeepenstein, Dec 31, 2004
    #6
  7. Dec 31, 2004
    Hippo393

    Hippo393 Jeepless

    Charlotte, NC
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    Sep 22, 2002
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    Yep, I've got it too, and it came from a '66 w/ V6. Thanks for the pic because I too didn't know what it was for.
     
    Hippo393, Dec 31, 2004
    #7
  8. Dec 31, 2004
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
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    Almost looks like a stop to keep torque from wrapping the leaf springs up under high load conditions. Kinda like a pinion snubber on the old Mopar muscle cars. Kinda works on the same principle as traction bars, except it doesn't decrease the ground clearance.
     
    w3srl, Dec 31, 2004
    #8
  9. Dec 31, 2004
    zed

    zed Iowa- Gateway to Nebraska

    central iowa
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    Aug 4, 2004
    Messages:
    745

    good call that's exactly what it reminded me of as well. my 69 v6 has it as well.

    zed (aka-- the other steve)
     
    zed, Dec 31, 2004
    #9
  10. Dec 31, 2004
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Isn't it for keeping the oil filter from meeting the pumpkin?
     
    Glenn, Dec 31, 2004
    #10
  11. Dec 31, 2004
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
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    4,422
    I believe someone else told me the same thing about being a torque arm. Like you say, the bumpstop on the axle would hit long before the arm in the picture would.

    And yea, my driveshaft hits the starter too.
     
    termin8ed, Dec 31, 2004
    #11
  12. Dec 31, 2004
    66cj5

    66cj5 Jeep with no name

    NorthWest Indiana
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    Sep 10, 2003
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    2,084
    mine has it too. spare axle does also.
     
    66cj5, Dec 31, 2004
    #12
  13. Dec 31, 2004
    Packer

    Packer Slacker

    Livermore, CA
    Joined:
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    Ok, so here's the scenario as I see it, when the right front wheel comes up into the wheel well:

    1. After about 1.5 inches of travel the "torque arm" bumpstop hits the bracket.
    2. As the axle continues up, the "arm" causes the front differential to rotate downward or counterclockwise when viewed from outside the vehicle right front.
    3. After about another 3-4 inches of the travel the axle hits the bumpstop on the main frame stopping further upward travel.
    4. At this point the differential has also stoppped rotating. And hopefully has prevented the driveshaft from smacking something.

    Do I have it right now??

    Thanks alot for the input!
     
    Packer, Dec 31, 2004
    #13
  14. Dec 31, 2004
    Mcruff

    Mcruff Earlycj5 Machinist

    Albertville, AL
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    Brian mine hits the arm bumper long before the bumpstop on the axle.
     
    Mcruff, Dec 31, 2004
    #14
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