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Transfer case mount? D18

Discussion in 'Early CJ5 and CJ6 Tech' started by Middlefork Miner, Aug 31, 2013.

  1. Sep 2, 2013
    cadwelder

    cadwelder Member

    Milton KY
    Joined:
    Jun 2, 2011
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    202
    THanks for that info, nickmil. Am curious if late '60s CJ5s with 4 cylinders had the holes in the frame for the V6 mount discussed in this thread, and shown in this pic (the holes with bolts and nuts):
    [​IMG]
     
  2. Sep 2, 2013
    Middlefork Miner

    Middlefork Miner Member

    N. Highlands Ca
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    Apr 1, 2013
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    187
    I'm gonna use what I have for the time being... I'm taking pictures and I'll get them posted when I'm done....even if I have to use my buds computer to email them to me or have him post them on photobucket. I'm gonna add some side support too.
     
  3. Sep 2, 2013
    wheelie

    wheelie beeg dummy 2024 Sponsor 2023 Sponsor

    York, PA
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    This makes me scratch my head. My '66 v6 and my '71 V6 have the donut style. I've parted at least 2 other late 60's V6 models. I've never seen one like is pictured on far right. I know the '66 is original. I suppose the '71 may have been changed at some point before I got it. Seems odd that I've never run across one of these. My interest is peaked. This is all very good info.
     
  4. Sep 2, 2013
    mortten

    mortten I can’t put my finger on it 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Peninsula, Ohio
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    My 69 had the donut
     
  5. Sep 2, 2013
    Middlefork Miner

    Middlefork Miner Member

    N. Highlands Ca
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    Apr 1, 2013
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    I'm still a little confused on how the metal could have snapped like it did...:? Maybe a combination of bad mounts all around?
    I got the mount welded & painted it yellow so any cracks will be easy to spot. My motor mounts are good but the tranny mount will get replaced when I put it back in....I'll post the pics as soon as I can get them loaded.
     
  6. Sep 3, 2013
    jpc

    jpc Sponsor

    Mead, Co
    Joined:
    Sep 5, 2010
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    115
    mounting may be transmission dependent.
    mine has the bar and square frame mount, T14, D18 single stick, 2 thick spacers between frame and cross member.

    some have spoken about the engine and transfer case but not the transmission.
    wheelie, what transmissions on your 66 and 71?

    I am beginning to believe it is transmission dependent, T14 is different.
     
    Last edited: Sep 3, 2013
  7. Sep 3, 2013
    piffey263

    piffey263 Active Member

    Medford, OR
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    Oct 16, 2008
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    1,214
    I don't know if this relevant but I think jpc might be right,

    The 66 never came with a t-14 and one of the previous owners swapped one In to my jeep with a factory adapter that goes between bell housing and transmission. Single stick transfer case was retained. I also got what appeared to be polyurethane spacers that where approximately an inch or more in-between crossmember and frame. Sorry the numbers are approximate jeep is two hours away.

    You can see that everything is shifted. the transmission sits farther back about half an inch to an inch, which previous owner never bothered moving clutch linkage.So the change was obvious. Perhaps jeep did this because in order for the doughnut mount to work they would have to redrill near the end of crossmember? Also it would appear the crossmember would have to be spaced even farther from frame to fit the rubber doughnut mount? Or cut it down.
     
  8. Sep 3, 2013
    jpc

    jpc Sponsor

    Mead, Co
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    Sep 5, 2010
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    I am 95% sure that the T14 came with D18 as a single stick only.
    The adapter you speek of is what the T14 came with on all V6 T14 combos.
     
  9. Sep 3, 2013
    wheelie

    wheelie beeg dummy 2024 Sponsor 2023 Sponsor

    York, PA
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    Not sure what the '66 is (though I should know). It's a Tux with the 225 and single stick Dana 18. The '71 has a T14 in it right now but..........had a Saginaw 4 spd adapted into it when I bought it (forgot about the Saginaw). So, that throws that out the window. I put the T14 in it when I rebuilt the JEEP with parts from here and there so, there's really no telling what crossmember and mounting style this JEEP actually came with from the factory.

    The '66 is bone stock original.
     
  10. Sep 3, 2013
    oldtime

    oldtime oldtime

    St. Charles,...
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    Aug 14, 2006
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    The correct torque reaction insulator and associated parts are relative to both the model and the vintage.
    It is also relative to the engine, the transmission, the specific transfer case and even the split brake master cylinder.

    GROUP 10-23 Rear engine support
    # A 6156 rear engine support insulator for T 90 transmissions (1945-1965)
    # 912721 rear engine support insulator for T98 transmissions (1956-1971)
    # 939995 rear engine support insulator for T86 transmissions and V-6 (1966-1967)
    # 948888 rear engine support insulator for T14 transmissions and V-6 (1967-1971)

    The above group shows 4 different rear transmission mounts used on CJ's from 1945-1971

    GROUP 18-02 TC front bearing cap
    A 956 transfer case front output cap for use with 3 speed dual lever control (1945-1965)
    913085 transfer case front output cap for use with 4 speed dual lever control (1956-1965)
    925627 transfer case front output cap for use with F-4 and V6 single lever control (1966-1971)
    999670 transfer case front output cap for use with V-6 single lever control (1971 only ?)

    The above group shows 4 different front TC bearing caps used on CJ's from 1945-1971.
    From the above you should realize that the 913085 is identicle to previous A 956 except that 1/4" is removed from side of bearing cap and shift pivot pin to provide clearance for the T98's extra width.
    925627 is identicle to A956 except that it eliminates uppermost casting for the dual top mounted shift levers to pivot.
    999670 is like 925627 except that it no longer has the lower portion of the casting for mounting the torque reaction insulator.
    The round type insulators cannot be used.
    Instead it has two bolt holes located further back and is identicle to D20 front bearing cap.

    GROUP 18-08 TC mounting
    A 147 transmission insulator bolt (1945-1970?)
    801043 insulator (1953 - 1970?)
    801042 snubber (1953-1970?)

    941822 bracket (1966-1970?)
    941400 insulator (1966-1970?) this is the same as a front 134 engine insulator
    941401 insulator spacer (1966-1970?)

    926671 insulator (1966-196?)

    945226 torque reaction insulator for use with T14
    948920 torque reaction insulator bracket for use with T14

    This group shows the various torque reaction insulators used and any special brackets required.

    GROUP 26-01 Frame
    649705 rear engine support crossmember for use with T90 (1949-1965)
    911622 rear engine support crossmember for use with T98 (1956-1965)
    918213 rear engine support crossmember for use with RHD (1960 - 196?)
    940986 rear engine support crossmember for T86 (1966-1967)
    947257 rear engine support crossmember for T14 (1967)
    948448 rear engine support crossmember for T86 and split brake (1967)
    948592 rear engine support crossmember for T14 and split brake(1967-1971)

    This group shows the different types of crossmembers used.
    Some have engine cable stays and some do not.
    Some have mounts to accept a round torque reaction insulator and some do not.
    Some have notched area for master cylinder and some do not.
     
    Hellion likes this.
  11. Sep 4, 2013
    djbutler

    djbutler Sponsor

    Rio Linda CA
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    Ken,
    You happen to have any pictures of these mounting group part numbers?

    Don
     
  12. Sep 4, 2013
    oldtime

    oldtime oldtime

    St. Charles,...
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    Sorry Don,
    I have no way to upload pics on public library computer.
    So I try generally to provide documentable text instead.

    The post 1965 CJ transfer case torque reaction insulators is certainly complex mystery.
    The reasoning behind and the correct application seems overly complex and confusing.
    And yet it gets even more complex when you include other late 60's Jeep models like the Commando.

    The snubber choice is greatly effected by the position of the transmission due to the differences in transmission insulators.
    (AKA rear engine support)
     
  13. Sep 4, 2013
    AKCJ

    AKCJ Active Member

    Fairbanks, Alaska
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    Aug 12, 2003
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    1,035
    FWIW I had to change mine as a result of installing the sm420 in my 70 V6. I ended up turning the cross member around (pass side to drivers side). For the snubber I just drilled a hole through the cross member to line up with the torque arm hole on the t-case. Then used the rubber puck in between the two plus another rubber on the bottom of the bolt. It's not fancy but does provide the support for the torque reaction.
     
  14. Feb 14, 2016
    iharding

    iharding Quitter

    Tacoma, WA
    Joined:
    Feb 24, 2013
    Messages:
    354
    Sorry to reply to such an old post but I put a T-90 behind my 225 and the crossmember is wrong. I bought a 4 cyl/ T90 crossmember and bought the isolator but it doesn't fit inside the diameter of the cup in mine (bottom pic above) but would have in the middle pic one. Another mystery, why they welded in a smaller cup to reduce the size for a different isolator? Ugh.
     
    Beach66Bum likes this.
  15. Jun 30, 2020
    truckee4x4

    truckee4x4 Grant Kaye 2023 Sponsor 2022 Sponsor

    Truckee CA
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    Bumping this old thread with another data point. Here is a pic of a new reproduction crossmember (installed) against the one that was on my 1966 V6/T86/D18 frame.
    121A577C-D002-4F39-AC2B-34A3251CA514.jpeg AD4581BE-9D35-461D-872C-8E47329E1620.jpeg

    I decided to replace it because it’s twisted pretty bad, beyond my ability to straighten. The flanges are bent from probable rock impact. I’m sure someone with better skills than me could straighten it. I also had a hodgepodge of pieces of flat stock on each side where it mounted to frame rails, totaling about 3” of drop.
    1C223D3D-9CCD-48AD-BB3F-B79C216505F8.jpeg
     
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