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78 J10 T18 To 203-205 Doubler?

Discussion in 'Jeep Truck and FC Tech' started by Robert72, Feb 4, 2020.

  1. Feb 4, 2020
    Robert72

    Robert72 New Member

    Portland
    Joined:
    Feb 4, 2020
    Messages:
    1
    T18 trans in my 78 j10. Curious on what 203 and 205 i should use to make a double case easiest..

    Been googling it and there is like 3 different options. Curious on what 203 bolts right into my
     

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  2. Feb 4, 2020
    Jw60

    Jw60 Recovering Jeepaholic

    Sedalia MO.
    Joined:
    Oct 5, 2018
    Messages:
    404
  3. Feb 4, 2020
    47v6

    47v6 junk wrecker! 2020 Sponsor

    Washington DC.
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    Oct 25, 2006
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    looks fun to do.
     
    Jw60 likes this.
  4. Feb 9, 2020
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
    Joined:
    Sep 23, 2002
    Messages:
    11,521
    If you can find a round pattern input 203 then it “should” bolt to a T-18 with a round pattern adapter for a 205/231/241/242 etc. I have no knowledge of round pattern 203’s so you are on your own there. I know there were some real late model 205’swiththe round pattern. The input spline count is another thing to consider.
     

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