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serious question about driveshafts

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by TxK5Blazer, Mar 31, 2003.

  1. TxK5Blazer

    TxK5Blazer 1/2 ton status

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    I am wanting to lift my 82 K5 6" and would like to know whether the drive shafts need to be legnthend or not some say yes some say no. I would appreciate any help in this matter soon looking to do lift this weekend ....Jason /forums/images/graemlins/usaflag.gif /forums/images/graemlins/k5.gif /forums/images/graemlins/usaflag.gif
     
  2. k20

    k20 3/4 ton status

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    on a K5 a 6" i am (ill say 95%) sure it will require a longer shaft.
     
  3. outlaw612

    outlaw612 1/2 ton status

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    With a 6" lift, I would say yes.
     
  4. georgiared84

    georgiared84 1/2 ton status

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    A 6" lift requires almost 2" more length on the driveshaft. If you have a np208 with a slip yoke that's a lot of the yoke pulled out of the transfer case.
     
  5. TxK5Blazer

    TxK5Blazer 1/2 ton status

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    would it be both driveshafts lengthened or just the rear?
     
  6. crazyrc

    crazyrc 1/2 ton status

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    You will have to lengthen both. Dropping the t-case an inch will help with length and angle. I VERY temporarily(half a day) had 8" of lift in a short box with the t-case dropped one inch. the shafts worked, but everything was fully extended and would not last long like that. You might get away with 6" and dropped t-case for a while...assumiing that you have the 208.
     
  7. TxK5Blazer

    TxK5Blazer 1/2 ton status

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    I have a 208 but i guess i will lengthened them two inches if that is correct?
     
  8. 87sm465np208

    87sm465np208 1/2 ton status

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    it might be possible to have the shop just install a CV on your existing driveshaft between the slip yoke and the driveshaft, and that would give you extra lenth, pluse vib resistance. just my .02 /forums/images/graemlins/thumb.gif

    /forums/images/graemlins/usaflag.gif /forums/images/graemlins/truck.gif
     
  9. zakk

    zakk 1/2 ton status

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    *sigh*

    there is no "one" answer. some don't need it, most do.
     
  10. georgiared84

    georgiared84 1/2 ton status

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    You'll have to get the truck up on the new springs and make a measurement before you get the drive shaft made. I landed my black k5 on a rock and busted my rear drive shaft so I had to get another one made. Since it wasn't at stock height, I got everything setting where I wanted it in the garage, measured, and took the old drive shaft, yoke, and differential flange down and had the new one made and balanced. I think it was only about 1 1/2" longer than stock for about 4" of lift.
     

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