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Relocating spring preches

Discussion in 'The Garage' started by smokkey1, Mar 27, 2005.

  1. smokkey1

    smokkey1 1/2 ton status

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    Any tips on doing this? I already have the old ones removed and bought some new ones.
     
  2. zcarczar

    zcarczar 1/2 ton status

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    measure, measure and measure again, then check your angles, hell maybe even bolt the axle in the truck with the spring perches not welded on to get the ideal pinion angle.
     
  3. smokkey1

    smokkey1 1/2 ton status

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    my pinion angle is pretty good right now. should I set the angle of the preches the same as the pinion?
     
  4. zcarczar

    zcarczar 1/2 ton status

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    Well it depends what kind of driveshaft you have, if CV point the pinion in line with the driveshaft, if not you want the pinion and t-case output to be parallel.
     
  5. smokkey1

    smokkey1 1/2 ton status

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    whatever comes stock on an 90' burb.


    so nobody has relocated spring preches before??? btw it's an 14FF...
     
  6. BAJA_BLAZER

    BAJA_BLAZER 1/2 ton status Author

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    You should have measured the angle of the old perches relative to the Pinion before you cut them off and then glued the new ones on at the same relative angle. Now your screwed! Just kidding… The best way to do it is to install the axle with the new perches loose, and then rotate the axle housing until you get it centered side to side and have the correct pinion angle, then glue it up.
     
  7. smokkey1

    smokkey1 1/2 ton status

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    I know, I though of that after I'd cut them off. well I'll just wait till I get the locker and the rest of the parts for the disk brake conversion. then weld up the perches
     
  8. mofugly13

    mofugly13 1 ton bucket of rust Premium Member

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    That's how I did mine. I got my D70 all mounted up, made sure the axle was centered, the perches were at their proper center to center distance, and the pinion angle all set, then I tacked it in, took it all apart and did the final weld with it off the vehicle. I bought some regular nuts for my u-bolts to make it easier to spin them on and off for the install and subsequent removal of the axle. It takes forever to spin those nylock nuts on/off, so I only switched to those for the final install.
     
  9. fliptuner

    fliptuner Registered Member

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  10. dark eternal

    dark eternal Registered Member

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    set the pinion 1-2 degrees low to compensate for axle wrap under power. Unless you have a link setup you DO haver some axle wrap.
     

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