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1971 Only Additional Front Bump Stops?

Discussion in 'Early Jeep Restoration and Research' started by Rubicloak, Apr 16, 2020.

  1. Apr 16, 2020
    Rubicloak

    Rubicloak Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Nevada
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    Good morning everyone. Does the 1971 frame have additional front bump stops from the factory? My my 69 frame does not have them but my 71 does. I first thought that they were added on by the PO until I saw the frame below listed by another member here.

    My 71 has factory 12 leaf springs on the front in case that has something to do with it. I am also noting that my 71 has the factory frame plating on the forward frame horns whereas the pic below (also a 71) does not?

    Please educate me as these are not shown in the parts manual (R2 or R3) under the frame diagrams. See red arrow below.

    450CEBB3-76F1-456B-A1C3-6D43D678634E.jpg
     
  2. Apr 16, 2020
    Fireball

    Fireball Well-Known Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Pullman, WA
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    Like you, my 71 has these bump stops and my 69 doesn't. Both are V6 Jeeps. Instead, the 69 has the torque arm stop on the right side. My guess is these rear mounted bump stops on the 71 perform the same roll of keeping the driveshaft from contacting the starter. Must have been cheaper to make.
     
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  3. Apr 16, 2020
    Keys5a

    Keys5a Sponsor

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    If I recall, my '72 intermediate (years ago) had those same spring stops.
    -Donny
     
  4. Apr 16, 2020
    Rubicloak

    Rubicloak Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    Does anyone know why? I cannot for the life of me see how you would ever engage the normal small stops having these on? So why would the small ones even be installed?
     
  5. Apr 16, 2020
    Twin2

    Twin2 not him 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Virginia Beach, VA
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    back when my spring were stock and flat from age
    I could see the frame/ spring stoppers working
    with a newer set of 2 1/2 lift springs . no way it would ever hit the stops
    as it was posted . I think it was more to keep drive shaft from hitting starter
    only picture I could find
    mc tee - Copy.JPG
     
  6. Apr 16, 2020
    Rubicloak

    Rubicloak Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    Very interesting.... Was there something about the 71 frames that required it, or just a frame evolution thing. I am still wondering as to why they are not in the frame diagrams for the R2 or R3 parts books?
    Obviously I will leave them on... Just could not figure out as to why they where there and on both sides. So clearly something Jeep felt was necessary and started in 71 or somewhere there about.
     
    Last edited: Apr 16, 2020
  7. Apr 16, 2020
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    Are they bolted or welded on ?
     
  8. Apr 16, 2020
    Rubicloak

    Rubicloak Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

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  9. Apr 16, 2020
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

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  10. Apr 16, 2020
    Mhovey46

    Mhovey46 New Member

    Connecticut
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    My 68 has the arm coming off of the axle and the riveted bump stop on the outside of the passenger side frame. What was interesting is that this 71 frame pictured had the same upper bump stop for the earlier style on the outside (I removed it to replace the one on my 68) but did not have the arm coming off the axle. It may have been put on there from the factory as they exhausted their supply of axles with the arm coming off. Then eventually they all came with the two bump stops in between the frame and the springs.
     
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  11. Apr 16, 2020
    Rubicloak

    Rubicloak Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    This is the psgr side of my Mar of 71.

    20200416_190212.jpg
     
    Last edited: Apr 16, 2020
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  12. Apr 16, 2020
    Rubicloak

    Rubicloak Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    Thank you for the link ITLKSEZ. I still have not seen anything that is definitive other than people speculating that it is to keep the drive line from getting all Biden with the starter.
     
    Last edited: Apr 16, 2020
  13. Apr 16, 2020
    Rubicloak

    Rubicloak Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    Parts book R3

    Screenshot_20200416-190838_Gallery.jpg
     
  14. Apr 16, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member 2021 Sponsor 2020 Sponsor

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    My 70 (1/70) has the torque arm as well....even with it, my front drive shaft has lovingly kissed the starter and left a bit of lipstick on it....
     
  15. Apr 16, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member 2021 Sponsor 2020 Sponsor

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    check the front axle diagram...there torque arm we are talking about should be there - it is only on the passenger side though...
     
  16. Apr 16, 2020
    Rubicloak

    Rubicloak Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    Ok, so it's the little extension with the bumper. Curious, my 71 27A axle does not have the arm but has the riveted stop. Jeep sure did some weird stuff in the day, or I guess that the PO could have removed the torque arm, however I cannot find any evidence on my axle that it was ever there.

    Screenshot_20200416-192337_Gallery.jpg
     

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    Last edited: Apr 17, 2020
  17. Apr 16, 2020
    Rubicloak

    Rubicloak Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    In the end I guess it is really inconsequential. The riveted outrigger for the torque arm on my Mar of 71 build must be a carry over? Although it really does not make any sense as to why they would still put it on the frame when it is not being used and 70 was the last year for it.
     
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  18. Apr 17, 2020
    TIm E

    TIm E Aggressively average 2021 Sponsor 2020 Sponsor

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    Freudian slip? :whistle:
     
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  19. Apr 17, 2020
    Keys5a

    Keys5a Sponsor

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    I believe the torque arm on that mates with the extension on the axle is specifically there to keep the starter from getting bashed by the driveshaft.
    The pair of spring bump stops are there to limit the compession of the front springs. My '72 CJ5 that had these bump stops had springs that were virtually flat, no arch. That Jeep sat with only about an inch or less of clearance between the spring and the rubber bumper on the bump stop. At one point, I fully compressed and chained down my suspension on that Jeep to autocross it. The springs were mashed flat, or beyond, and the fronts were solid against these bump stops. I still had some clearance between the engine and front axle, but not much.
    -Donny
     
    Last edited: Jun 14, 2020
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  20. Apr 17, 2020
    Rubicloak

    Rubicloak Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    Let's go with that (y)
     
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