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1966 Cj5 Transmission Mount

Discussion in 'Early CJ5 and CJ6 Tech' started by Paulr26, Sep 5, 2019.

  1. Sep 5, 2019
    Paulr26

    Paulr26 New Member

    Shelton, CT
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    Hello, I have a 1966 CJ5 with the Dauntless V6, T86 transmission and Dana 18 transfer case. I have had to replace my frame because the old one was so rotten. I found a M38A1 frame to replace it with. This frame is set up for the F134 engine. So I cut the motor mount perches off the original frame and will use them on the F134 frame when I can figure out where they need to be located. Herein lies the difficulty. I can see where the crossmember for the transmission was mounted on the new frame. I assume it also had a T86 transmission and Dana 18 transfer case, and the I would be correct putting the crossmember back where it was on the military frame. I even saved the piece of wood that spaces the passenger side end of the crossmember down! The transmission mount was to dilapidated on my Jeep that I have no real idea what it used to look like. The military frame didn't have a crossmember on it. I have ordered the rubber insulator for the transmission mount, and the snubber for the transfer case. But I really do need a very detailed illustration of what the transmission mount should look like. I need to make sure I have everything I should have installed between the crossmember and the transmission. That way I can be sure the transmission and transfer case are in the right location, and I can then determine exactly where the engine perches go on the frame, and I can weld them in. Can anyone help with the detailed illustration of what is supposed to go between the transmission and crossmember? Maybe an exploded view? Pictures? Anything that would show me what belongs there? Thanks for any information you might have! Looking forward to heading the Jeep back to being solid and complete. :D
     
  2. Sep 5, 2019
    kenb

    kenb Member

    Detroit
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    M38A1 had a T90. I can hopefully crawl under mine in the next day or so and get some photos. Also I'll see if the manual has any good diagrams
     
  3. Sep 5, 2019
    Buildflycrash

    Buildflycrash Member Sponsor

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  4. Sep 5, 2019
    Paulr26

    Paulr26 New Member

    Shelton, CT
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    That looks like the part I have coming. I can see how it attaches to the transmission. But what attaches it to the crossmember?
     
  5. Sep 5, 2019
    Paulr26

    Paulr26 New Member

    Shelton, CT
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    Thanks very much for any info!
     
  6. Sep 5, 2019
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
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    The T-86 is very much like the T-90, but you can't make any assumptions.

    I would appraoch this differently. I would first place the V6 mounts on the new frame and position the engine, transmission and transfer case in the proper location. I would then place the crossmember at the location determined by the mount on the transmission.
     
    FinoCJ likes this.
  7. Sep 5, 2019
    Paulr26

    Paulr26 New Member

    Shelton, CT
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    The rub with that plan is, I have no real clue as to where the V6 mounts belong, but I do know where the crossmember was located on the new frame. I was just trying to take what I do know and use it to deduce what I don't know. :) Is there some information available that defines where the V6 mounts are to be located on a frame?
     
  8. Sep 5, 2019
    Beach66Bum

    Beach66Bum ‘66 Tux Sponsor 2019 Sponsor

    Big Island on...
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    I will measure from the front frame horn to the centre of the engine mount on my v6 cj5. I will have it for you tomorrow.
     
  9. Sep 6, 2019
    TIm E

    TIm E Member Sponsor 2019 Sponsor

    NW Arkansas
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    I am not familiar with the T86 set-up, but this is how the Dauntless/T-14 mounts...

     
  10. Sep 6, 2019
    kenb

    kenb Member

    Detroit
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    Is that under a Jeep? I don't understand. It's clean and not covered with oil....
     
    masscj2a and Buildflycrash like this.
  11. Sep 6, 2019
    kenb

    kenb Member

    Detroit
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    20190906_104814.jpg IMG-20190906-WA0007.jpg IMG-20190906-WA0008.jpg IMG-20190906-WA0009.jpg IMG-20190906-WA0010.jpg IMG-20190906-WA0011.jpg
    For whatever it's worth.
     
  12. Sep 6, 2019
    Paulr26

    Paulr26 New Member

    Shelton, CT
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  13. Sep 6, 2019
    kenb

    kenb Member

    Detroit
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    IMG-20190906-WA0021.jpg IMG-20190906-WA0023.jpg IMG-20190906-WA0022.jpg
    Underside of my M38A1 with a probably civilian T90 and D18
     
  14. Sep 6, 2019
    Paulr26

    Paulr26 New Member

    Shelton, CT
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    That looks like mine. Same snubber for the D18. I will look at my trans mount again tomorrow to see if that's what I have. I think it is. I still don't see how the rubber insulator on the trans mount is held to the cross member...
     
  15. Sep 6, 2019
    kenb

    kenb Member

    Detroit
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    15437.jpg
    I think it's the big one in the middle on this picture. Two studs on the bottom attached with nuts under the cross member. Is that what you're asking about? The round one on the side I'm not sure.
     
  16. Sep 7, 2019
    Rick Whitson

    Rick Whitson Detroit Area Sponsor 2019 Sponsor

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    When I tore down the V 6 chassis it used the V 6, T 90, D18, used the same cross member as the F134, but was moved back on the frame about 6" and had a flat plate to move the off set at the donut about an inch or so to the outside. I can't remember exactly, but thought it was a strange set-up for a factory part. There were two sets of holes in the frame for the F 134, and more toward the rear another holes for the same cross member. Good luck
     
    Last edited: Sep 7, 2019
  17. Sep 7, 2019
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
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    Mmm ... was it a T-90 Rick? If so, it would be a converted chassis. The V6 only came with the T-86 or T-14. The T-86 looks and shifts like a T-90, but has a different case and some important internal differences.
     
  18. Sep 8, 2019
    Rick Whitson

    Rick Whitson Detroit Area Sponsor 2019 Sponsor

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    It was a T 86, but I put an F 134 in it with a T 90 bolted to the D 18 large index V 6 transfer case. I gave the V 6 and the T 86 to a friend that had a V 6, so yes it was a T 86 Tim.
     
  19. Sep 8, 2019
    Walt Couch

    Walt Couch sidehill Cordele, Ga. Sponsor 2019 Sponsor

    cordele, Ga.
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    [​IMG]
    This for the frame horn location for motor mounts. Your T-86 trans has a "z" bracket that locates the trans to the rubber mount then to the cross-member.
     
  20. Sep 8, 2019
    Rich M.

    Rich M. Shoe pusher

    Maryland
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    This is the one that came on my roller chassis.
    IMG_20181108_164226881~2.jpg
     

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