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3/4 or 1 ton NP 203?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by doc70sub, May 25, 2002.

  1. doc70sub

    doc70sub 1/2 ton status

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    Hey Guys/Gals,
    I just purchased a 14-bolt FF for my '75 K-10 or '79 K-5 (might be selling the K-10) & have a question. Are there 3/4 or 1-ton output yokes for the 203 transfer case? I'd like to run the full heavy driveshaft when I install the 14-bolt. I know you can get the hybrid or bastard u-joint, just seeing if there are any options first. Thanks!
    Doc
     
  2. thatK30guy

    thatK30guy 1 ton status Premium Member

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    I believe there are different choices available for yoke sizes on the 203.

    I removed a 400/203 from a '79 K20 and the yoke size at the 203 end was the 1310 joint.
    The joint end at the 14FF was the standard 1350 series yoke.

    I have no idea why GM must have mixed and matched the yoke sizes on the rear 203 outputs. /forums/images/icons/tongue.gif
     
  3. efilnikufecin

    efilnikufecin 1/2 ton status

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    i pulled the 203 i have out of a 74 3/4 ton and it had the 1350 yoke already in place.i also took the driveshaft out and had it cut down to fit my K5.haven't had a lick of trouble with it yet.
     
  4. BorregoK5

    BorregoK5 1/2 ton status

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    You can purchace the 1350 yolks from driveline shops for the np203.. Jesse at High Angle has them, Arizona driveline does too.
     
  5. doc70sub

    doc70sub 1/2 ton status

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    Thanks guys!
    Doc
     

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