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HELLP Changing out running gear.

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by gassman, Aug 9, 2000.

  1. gassman

    gassman 1/2 ton status

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    Have 71 Blazer stock and want to put 3/4 running gear under it. Have a Dana 60 front and a 14 bolt rear in the shop for it . Question is what do I have to do to the yokes and drive lines for this. Have a 4" lift also for the new running gear. also brake lines. Thank for any Help.
     
  2. Blazer1970

    Blazer1970 1/2 ton status

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    For the rear, the best way is to get the output yoke for the NP205 that is for the big U-joint, and then have your driveshaft rebuilt to use the big U-joints. For the front, you probably have to use the stock CV joint at the t-case, so you will have to have that driveshaft modified to use the big U-joint on the Dana 60 end. Get your axles and lift installed, so that you can measure for driveshaft length before you have work done on them.

    Tim

    1970 Blazer CST 4X4 350 SM465 NP205
    1987 Suburban 4X4 350
    1988 Chevy Pickup 4X4 350
     
  3. You may be able to use the ""trick" two sized u-joints for it and not mess with the shafts. It is good practice to leave one weaker link somewhere and u-joints are easier to fix on the trail.

    [​IMG]<font color=red>BigBurb[​IMG]
    <font color=purple>IF YOU'RE SCARED, SAY YOU'RE SCARED !!
     
  4. gassman

    gassman 1/2 ton status

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    Where would you get one of those bad boys (Two sized U-joints)
     
  5. Mudzer

    Mudzer 1/2 ton status Author

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  6. gassman

    gassman 1/2 ton status

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    Thanks for all the information. You guys are great.
     

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