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Is a 700R and NP203 combo possible

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by WARP1, Apr 5, 2001.

  1. WARP1

    WARP1 Registered Member

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    Could I put a 700R trans in my Blazer and keep my NP203 T-case? What would I need to modify to get these two to bolt together?
     
  2. HarryH3

    HarryH3 1 ton status Author

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    Advance Adapters makes the parts you need to do this. Check out <A target="_blank" HREF=http://www.advanceadapters.com/BUYERSGUIDE/acrobat/gm.pdf>http://www.advanceadapters.com/BUYERSGUIDE/acrobat/gm.pdf</A>.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
    It's a great day to be alive...
     
  3. Executioner

    Executioner 1/2 ton status

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    Yes it is possible, how much do you want to spend $$$$$$$$$$$$$$$$$$$$$$$$$
     
  4. Wheels

    Wheels 1/2 ton status

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    You'll need the tailshaft the fits the 203 ($170 from Advanced Adaptors, also fits the 205) and you'll need to lengthen the side torque strut, shorten the rear drive shaft and lengthen the front drive shaft (about 1 and 3/8"). You may also have to modify the hole in the floor pan where the shifter goes (otherwise you won't get 4-hi). Also the crossmember will have to be moved back and new holes drilled. The steering column (1981 and earlier) will have to be swapped out for a 1982 or later model, unless you don't ever forsee using D1. Other than that, it's a piece of cake.
     
  5. Executioner

    Executioner 1/2 ton status

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    May I suggest a NP208 transfer case ?
    If you really must have the NP203 go for it, I don't know your appliction/use, but the NP203 is getting
    old, and the chain will strecht/wear out, someday, even if you just rebuilt it.
    Its kinda heavy !
     

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