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driveshaft: 10 bolt to 14 bolt

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by R72K5, Feb 14, 2003.

  1. R72K5

    R72K5 Banned

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    anyone who has put in a 14 bolt FF 10.5" in place of an 8.5" 10 bolt can you tell me what difference in length of driveshaft you encountered ?
    i already know ill need a bastard/conversion U-joint



    thanks
     
  2. the professor

    the professor 1/2 ton status

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    Maby not on the u'joint..
    ==
    I have a 14FF, it uses the 3.75 u'joints
    ==
    I have a 10 bolt out of a 1987 1/2ton suburban, it too has a 3.75 rear u'joint
    ==
    I did a rough measurement, and it looks like the pinions protrude the same amount on all 10/12/14, so they all MIGHT take the same shaft..
    ==
    Only way to check for sure is install it and see if it fits...
    /forums/images/graemlins/cool.gif /forums/images/graemlins/truck.gif
     
  3. rick88blaze

    rick88blaze 1/2 ton status

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    do a search in the "GARAGE" on here there are some posts in there about this, i'm pretty sure you'll need to shorten your driveshaft a little, i don't know how much though.
     
  4. R72K5

    R72K5 Banned

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    found out is same length after all, but initial measurements looked like was gonna need longer shaft to go from 10 to 14, but im not swapping after all, at least not yet, hopefully post helps others out somehow

    thanks
     

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