looking for info or picks on the 203 doubler to auto tranny

Discussion in '40- & 55-Series Tech' started by pbgbottle, Nov 16, 2005.

  1. pbgbottle

    pbgbottle Forum Lifer

    Messages:
    4,727
    Media:
    92
    Albums:
    5
    Likes Received:
    389
    Joined:
    Feb 8, 2004
    Location:
    Cloverdale B.C. Canada
    i'm interested in doing this tranny swap into a fj40 or a fj45 , not sure what i want to build . ( fj45 ) . what tranny is recommended turbo 350 , 400 , or the newer ones ,700r -4, 4L60-E , to np203 doubler , anyone have any picks of this setup ? how long is this assembly ? and will it fit in a fj40 ? i probably will stretch the frame and order a fj45 cab from aqualu . any info or links would be appreciated . also any pics of frame stretching ?
     
    Last edited: Nov 16, 2005
  2. Gumby

    Gumby Supamod Staff Member s-Moderator

    Messages:
    12,219
    Likes Received:
    668
    Joined:
    Dec 13, 2002
    Location:
    Knee deep in hookers and gin
    Doubler will fit fine on a Th400 or a Th350 as that's what the np203 came on. Then you just use the AA adapter to mount the grb on whatever toyota transfer you want. If I had it over to do again, I'd adapt a 700R4 to the np203, it's a pretty easy deal if you're getting the 700 rebuilt. then put a split case behind that.

    Engine moved as far forward as possible, raised up with a 2 inch body lift and rear springs flipped and my rear driveshaft had about 3 inches of tube with a SOA. That was without the needed CV joint or extended slip joint.

    Fits amazingly well in a 55. Works amazingly well, too.

    http://www.bonnifer.com/Cruiserhome/Th400-NP203-LCtransfercase.htm
     
  3. bustanutley

    bustanutley

    Messages:
    2,285
    Likes Received:
    4
    Joined:
    Apr 10, 2004
    Location:
    denver
  4. HI^C

    HI^C

    Messages:
    1,234
    Likes Received:
    2
    Joined:
    May 22, 2003
    just to help

    chevy bell is 6 3/8

    24.37" TH400
    21.75" th350
    23.4" 700r4/early 4l60e
    21.9" late 4l60e
    26" 4l80

    10.5" sm420
    12" sm465
    10.7" np435
    18.9" nv4500
    12" 4sp LC tranny

    3.25 700r4 to 208
    6.75 465 to 205
    3.5 350 to 205
    4.25 465 to 203
    4.25ish 400 to 205
    1.75 early AA adapter th350 to LC case, close to the short downey one now.

    11" face of lc 4 speed case to center of yoke about 1.5 off that for flange
    12.25 face to center yoke 205 no adapters
    will not post slip yoke, and POS 208 numbers.
    5.75 for 203 range box only

    some misc doubler numbers

    47.5" NV4500, np203, np205
    44.75" Sm465, np203, np205
    52.25"/56.375" TRII, SM465, np203, np205
    46.85"/49.35"/50.35" T400, np203, np205
     
  5. pbgbottle

    pbgbottle Forum Lifer

    Messages:
    4,727
    Media:
    92
    Albums:
    5
    Likes Received:
    389
    Joined:
    Feb 8, 2004
    Location:
    Cloverdale B.C. Canada
    awsome info thats what i was looking for .
     
  6. Mace

    Mace rock scientist.. Staff Member s-Moderator

    Messages:
    21,564
    Likes Received:
    2,018
    Joined:
    Feb 17, 2002
    Location:
    Las Vegas
    I am going to shortly have a 5.0/C6/203/split tcase

    I should have it together next week somtime..

    I'll get pics.
     
  7. pbgbottle

    pbgbottle Forum Lifer

    Messages:
    4,727
    Media:
    92
    Albums:
    5
    Likes Received:
    389
    Joined:
    Feb 8, 2004
    Location:
    Cloverdale B.C. Canada

    cool ! would love to see this
     
  8. Antefx

    Antefx

    Messages:
    1
    Likes Received:
    0
    Joined:
    May 9, 2006
    new again?

    been awhile since I worked on an fj. Had a 75 with a tpi, th400, lc transfer case, stock axles. Now I own a project '73, carbureted 350, turbo 350, np203, 3/4 ton chevy axles. Want to end up with fuel injection, overdrive, and split transfer case. Just checkin in to see what everyone is doing. Awesome information on this forum
     
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.