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T90 Crossmember Mounting Questions

Discussion in 'Early CJ5 and CJ6 Tech' started by Jamco6000, Dec 8, 2012.

  1. Dec 8, 2012
    Jamco6000

    Jamco6000 Member

    Baton Rouge, LA
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    My jeep never came with a tranny. Picked up a rebuilt T90 and D18 combo. Is there a specific cross member that i need? I know i need to drill some new holes but the d18 rubber mount doesnt line up. Any advice on getting this things mounted? Below is my current crossmember

    [​IMG]

    [​IMG]
     
  2. Dec 9, 2012
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    I think you'll need the mounting plate that bolts to the bottom of the transmission case (if you don't already have it).
    The rubber mount would then be sandwiched between this plate and your crosmember.
    Shouldn't have to drill any new holes; the holes appear to be correct in the crossmember for both the rubber mount and the skid plate.
     
  3. Dec 9, 2012
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    JP is right - there is a plate you need. If you don't have it, PM me. I just pulled a bunch of them off T90s.
     
  4. Jan 5, 2013
    Jamco6000

    Jamco6000 Member

    Baton Rouge, LA
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    Does someone have a picture of this connection? T90 on the cross-member with the adapter? I'm having a hard time putting 2 and 2 together on this one.

    To get this straight, I take the rubber mount off my T90, mount it to the cross member, and then mount the plate to T90?
     
  5. Jan 5, 2013
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    from the parts manual: shows the offset bends in the mounting plate.
    http://i38.photobucket.com/albums/e121/348Win/t90transmount_zps1ec67b40.jpg

    actual plate: the two narrower holes near the bottom show the rust outline of where it attaches to the transmission case.
    http://i38.photobucket.com/albums/e121/348Win/t90mountplate001_zps987a1fc1.jpg

    this side is the transmission rubber mount side, as evidenced by the rust outline of the p/n A-6156 rubber mount.
    http://i38.photobucket.com/albums/e121/348Win/t90mountplate002_zps24e37d29.jpg
     
  6. Jan 5, 2013
    Jamco6000

    Jamco6000 Member

    Baton Rouge, LA
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    ok I don't have that transmission rubber mount A-6156. Will have to order one. Thanks!
     
  7. Jan 24, 2013
    Jamco6000

    Jamco6000 Member

    Baton Rouge, LA
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    Ok I received the transmission rubber mount but it doesn't mount to my existing cross member. It the holes in the cross member need to be about a half inch further apart..... Also is the T90 an even swap from the T14 or T86, what ever was stock? Do I have to drill new holes in the frame? Is there supposed to be a spacer between the frame and cross member? If so how big? A pic of the cross member installed with a t90 to 225 taken from the drivers side frame level would be awesome.
     
  8. Jan 25, 2013
    Don X

    Don X The Prodigal Moderator Staff Member 2023 Sponsor

    San Diego,...
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    The T90 should have been stock. as far as the spacer, you won't need any with a T-90.
     
  9. Jan 25, 2013
    Jamco6000

    Jamco6000 Member

    Baton Rouge, LA
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    This is how far off the adapter is. Is this the wrong cross member? Does anyone have a spare cross member laying around that works?

    Matched up on one side
    [​IMG]

    How off it is on the other side
    [​IMG]
     
  10. Jan 25, 2013
    jasonjp62

    jasonjp62 Member

    Pennsboro WV.
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    Sure looks like a crossmember for a t90/dana 18 to me. Might have to loosen your motor mounts and move stuff around some. when I put mine back together this spring it took some time moving it around until it fit.
     
  11. Jan 25, 2013
    Jamco6000

    Jamco6000 Member

    Baton Rouge, LA
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    I mean the holes just dont line up. I'm thinking of just welding the holes up on the x member along with a support and re-drilling new holes unless anyone has any suggestions. Anyone think just widening one of the holes would be safe?
     
  12. Jan 25, 2013
    jasonjp62

    jasonjp62 Member

    Pennsboro WV.
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    Ok I got ya, does the mount for the dana 18 line up line up?on the passenger side?
     
  13. Jan 26, 2013
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
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    I think there is some confusion in that some replies are indicating "T-90 is stock" etc. My understanding is you are working on a 66 cj5 with 225V6. This unit came stock with the T-86 tranny. The T-90 is not a direct bolt-up. Your pictures indicate you already have the tranny and x-fer bolted up to the 225 with the appropriate adapter. This means the T-90 that you bought rebuilt, was already adapted with the longer "J" input shaft and the proper bolt pattern adapter for the 225V6. Are we correct so far? The pictures you show indicate you are trying to mount the cross-member too far forward.
     
  14. Jan 26, 2013
    culls

    culls Member

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    Unless it came with a Hurricane and a previous owner swapped in a Dauntless without changing the transmission?
     
  15. Jan 26, 2013
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    In your picture of the rubber transmission mount holes not lining up properly, you appear to have the plate that bolts to the bottom of the T-90 facing the wrong direction; it should be facing rearward.
    Start by bolting that to the bottom of the transmission case.

    The next item to check would be the positioning of the cross member in relation to the side or torque mount pad on the transfer case; that would be the large hole in the cross member higher up on the passenger side of the crossmember; this needs to be in alignment for proper placement of the rubber doughnut torque mount. (does your D18 have the "foot" on it for this mount?

    With the transmission mount and plate in proper position, the torque mount pad in alignment with the d18, now you can drill/mount the cross member to the frame, making new holes or using existing if everything lines up properly.

    After that is accomplished, you can now align and drill holes, if necessary, for the rubber transmission-to-cross member mounting (using whatever mount you want), adjusting for side to side as necessary.

    If I recall, the transmission mounting plate should be offset to the rear of the Jeep, not to the front as in your picture; as others said, the cross member should be moved rearward as well.

    If the Jeep was factory V6, then it may have had the P/N 939995 long skinny rubber mount; it did use different mounting holes.
    If I misled you, I apologize. I was going off what I can see in the pictures.
     
  16. Jan 26, 2013
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    It has been too long since I had a T90 with the V6 setup. If the plate I sent you is wrong (after following JPFlat's instructions) - let me know and I'll look though some of the other plates I have out there. The one I sent I know is off the T90, so it may be with the crossmember.
     
  17. Jan 26, 2013
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    Since I ran a T90 behind a V6 (until most recently), I feel confident in my statements.
     
  18. Jan 26, 2013
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
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    I am running a T-90 behind a 225V6 at present. Can't promise but will try to get some pic's tomorrow.
     
  19. Jan 27, 2013
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
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    Will show you how mine is mounted and I did not have to re-drill any holes. This pic shows how the bracket mounts to the rear two holes on the T-90.
    [​IMG]

    This one shows how the mount sets on the bracket.
    [​IMG]

    This shows the location of the cross-member in relation to the tranny/xfer case.
    [​IMG]

    This one shows relation of x-member to drain plug in tranny.
    [​IMG]

    Looking at mounting from the front to the rear.
    [​IMG]

    Here you can see the torque mount portion bolted under x-member. Above the x-member is a rubber bushing and then a piece of heavy steel bent into the shape of a "Z" that bolts to the D-18 for torque stability.
    [​IMG]

    Hope this is not too confusing and will work for you. This mounting procedure works on mine without crowding or rubbing any bolts etc. HTH
     
  20. Jan 27, 2013
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    Walt's pictures show the 939995 mount FYI.
    Mine being a CJ2A, the mounts could be different between the models.
     
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