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Replacing 1976 TH350 ..Need Advice

Discussion in 'Transmission & Transfer Case' started by jfkelley, Apr 14, 2019.

  1. jfkelley

    jfkelley Junior Member

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    Joined:
    Apr 14, 2019
    Location:
    Oklahoma City
    First Name:
    John
    Truck Year:
    1976
    Truck Model:
    K10
    Engine Size:
    350
    Newbie Here ..The transmission in my 1976 K10 4x4, TH350 NP203 has went out ..I purchased an rebuilt 1985 K Series Blazer TH350 long shaft Transmission , Installed the Transmission, went to attach the NP203 Transfer case and it would not fit ..Do I need an adapter to make this work ? Thanks In Advance
     
  2. HotRodPC

    HotRodPC Administrator Staff Member

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    Joined:
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    Location:
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    First Name:
    HotRod
    Truck Year:
    85
    Truck Model:
    Silverado K10 to K20 Conversion
    Engine Size:
    6.2 to Gas???
    There are 3 different lengths of the 4x4 output shafts, 1 for NP203, NP205 and NP208. The one you acquired is likely for an NP208 and possilby used a 2in spacer also which means it's likely a 2wd transission that's been modified to replace a 700r4. Did you get the 2in spacer too? Not that it'll work for the NP203, but to confirm it's for an NP208 set up.

    I noticed you're in OKC, OK. I might know a guy who knows a guy that can swap those shafts, or maybe even better, swap the guts into your original 4x4 trans case since the cases are a bit different.
     
  3. jfkelley

    jfkelley Junior Member

    Posts:
    2
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    Joined:
    Apr 14, 2019
    Location:
    Oklahoma City
    First Name:
    John
    Truck Year:
    1976
    Truck Model:
    K10
    Engine Size:
    350

    Yes sir In OKC ..Please send me his number
     
  4. HotRodPC

    HotRodPC Administrator Staff Member

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    3,387
    Joined:
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    Location:
    OKC, OK
    First Name:
    HotRod
    Truck Year:
    85
    Truck Model:
    Silverado K10 to K20 Conversion
    Engine Size:
    6.2 to Gas???
    :happy175: I'm the guy I know. Where do you live in OKC? I'm near SW 89th and May.
     
    SquareRoot and 77 K20 like this.

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