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Dana20 swap into CJ-2A

Discussion in 'Flat Fender Tech' started by Thenderson, Feb 10, 2008.

  1. Feb 10, 2008
    Thenderson

    Thenderson New Member

    Calgary Alberta...
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    Feb 10, 2008
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    Would anyone know where I can get a picture of a T86 bearing retainer. I cant seem to find one online. Im bolting up a big hole Dana 20 where a small hole dana 18 was. Im told that this is what is needed to swap in this T-case. Any help would be great.
     
  2. Feb 11, 2008
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
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  3. Feb 11, 2008
    4dawudz

    4dawudz Dale

    ADK NORTHERN New...
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    And the rearend too????

    Dale
     
  4. Feb 12, 2008
    Thenderson

    Thenderson New Member

    Calgary Alberta...
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    Feb 10, 2008
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    I have a 47 CJ-2A with a 327cid SM420 and Dana18 set up. My rear end is gone and I am swaping in a set of toyota 8" axles. I have an adapter to mate the SM420 to a Dana18. I want to mount a Dana 20 because I need a centered rear output shaft for the centered Toy rear axle. I was reading somewhere else on this forum that one guy was swaping a small hole dana18 for a big hole dana18 and he did it with the use of a T86 bearing retainer. I just need to know what it looks like so I can find one. That Novak site has no info on the
    T86.
     
  5. Feb 12, 2008
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    I've got one at home. I'll try and take a pic tonight and post tomorrow. Nickmil
     
  6. Feb 12, 2008
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    Jul 30, 2003
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    here's a parts book pic in the meantime
    trans rear bearing retainer
    the Jeep p/n is : 928477

    where are you located Thenderson
     
    Last edited: Feb 12, 2008
  7. Feb 12, 2008
    Thenderson

    Thenderson New Member

    Calgary Alberta...
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    Thanks for your help. Im in Calgary Alberta Canada. Witch part in that diagram is the retainer?
     
  8. Feb 12, 2008
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    Jul 30, 2003
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    the item labled 6-052-2
     
  9. Feb 13, 2008
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Here's a couple of pics. One shows from the back. You can see they are the same on the back side. The one on the right is the T-86 retainer with no bearing or snap ring. The retainer on the left is a stock T-90 small hole retainer. On that one the bearing sits in the recess and centers the small hole case. Another pic shows the back of a T-10 adapted to Jeep 20 or 18 with the T-86 bearing retainer installed with a sealed bearing to keep the fluid from traveling between the trans and transfer case. The other pic shows the retainers from the side. If you look close you can see a small hole drilled towards the top of the T-86 retainer. Reason for that is the snap ring that retains the bearing had the angles on the ends the wrong way and had no way of pulling it out. I drilled a small hole in line with the snap ring so I could use a small punch to push the end of the snap ring out of the groove and remove it. Moral here is before you install the snap ring make sure you can grab it to remove it down the road. If the snap ring has the angles the wrong way then grind the ends so you can catch an end before installing it. Hope these help. Nickmil
     
    Last edited: Mar 11, 2008
  10. Feb 13, 2008
    Thenderson

    Thenderson New Member

    Calgary Alberta...
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    Feb 10, 2008
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    What stops that whole shaft and bearing from moving back while operating. My small hole
    D18 had a sholder that sandwitched the bearing against the sholder on the adapter. The
    D20 doesnt have anything to stop movment except the gears. Also there is nothing to stop lateral movment.
     
  11. Feb 13, 2008
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    If you look close at the first pic, the one of the transmission, you can see the shoulder of the bearing retainer where it presses into a recess in the adapter. That shoulder is then flush with the adapter. The outside of the retainer just fits into the indexing hole of the transfer case and centers it properly. When the transfer case is bolted up it sandwiches the retainer between the adapter and the transfer case so it can't move. When the transfer case input gear is installed and torqued, the transmission output shaft is pulled back and held in place by the nut. Behind the bearing retainer there is usually another bearing locked in place except in certain transmissions like the T-86, T-90, etc. The bearing inside the retainer, the spacer behind it, the transfer case input gear, the washer and retaining nut, and the way the retainer is sandwiched in place keeps everything from moving around. Nickmil
     
    Last edited: Feb 13, 2008
  12. Feb 13, 2008
    Thenderson

    Thenderson New Member

    Calgary Alberta...
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    So you say you have one of those Bearing retainers? Are you a retailer or somthing? Would you have a new bearing and snap ring for me as well?
     
  13. Feb 13, 2008
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Nope. Just one I had around for my own use. I have lots of stuff around for my own use, the perils of owning 7 Jeeps. If you call R&P at 503-557-8911 they can set you up though as can Herm Tilford, Krage, and several others. I know Paul at R&P has some on the shelf as I saw them a week or so ago but not sure what he gets for them.
     
  14. Feb 13, 2008
    Thenderson

    Thenderson New Member

    Calgary Alberta...
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    OK good thanks for your help. What number of bearing is that? #307?

    Now I just need to figure out what master overhaul kit to buy for my SM420 rebuild.
     
    Last edited: Feb 13, 2008
  15. Feb 13, 2008
    Thenderson

    Thenderson New Member

    Calgary Alberta...
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    Now I just need to figure out what master overhaul kit to buy for my SM420 rebuild.
     
  16. Feb 27, 2008
    Thenderson

    Thenderson New Member

    Calgary Alberta...
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    Well the bearing retainer came today. It fits into the D20 like a glove but it doesnt fit into the SM420 adapter. I noticed that in one of those pictures of the retainer it seemed like the retainer pressed into the adapter. Can I knock out that insert in my adapter and press in the new retainer or will I have to do some machining? Ill take some pics tomorrow to make things a bit more clear. Any help would be great.
     
  17. Feb 27, 2008
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Yup, you need to remove the T-90 retainer that's in there now. The T-86 retainer presses in where the T-90 retainer was at. The adapter side has the same dimensions on both retainers. Nickmil
     
  18. Feb 27, 2008
    Thenderson

    Thenderson New Member

    Calgary Alberta...
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    This is the D18 adapter that I have. Can you see how the sholder on the retainer will interfere with the D20 mounting up flush with the adapter? Will I have to get that sholder machined off or is there somthing else that I can do?

    [​IMG]
    [​IMG]
     
  19. Feb 27, 2008
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Are you sure that's a T-86 bearing retainer? It looks like it could be one from a T-150 which is a larger diameter. The T-86 bearing retainer has the same od on the outside of the step as the outside diameter of the T-90 plate (small hole bearing plate). If you can remove the existing T-90 plate and measure it as compared to the bearing retainer you have there it will tell you real quick. Nickmil
     
  20. Feb 27, 2008
    Thenderson

    Thenderson New Member

    Calgary Alberta...
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    I did remove the T-90 retainer. This new retainer is not the same on the back side as the T-90. Sould it be? Should the T-86 retainer have the same machining on the trany side as the T-90?
     
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