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Echobit flip and pinion angle... **searched**

Discussion in 'The Garage' started by 89GMCSuburban, Jun 18, 2003.

  1. 89GMCSuburban

    89GMCSuburban 1/2 ton status

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    I searched but couldn't find anything talking about pinion angle after doing the flip. I am seriously eyeballing this kit for ease of install plus the total lift it will give me. What's the story with pinion angle on it? Will I have to get shims to correct it?
     
  2. BorregoK5

    BorregoK5 1/2 ton status

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    You will need pinion angle correction with a shackle flip. With a Suburbans longer wheelbase you would be looking at a 6-8 degree shim on both perches. Steel shims which bolt to the pack are the best way to go, some offer axle relocation up to 1 1/2" as well to make up for the 1/2" loss of wheelbase from the flip.

    David runs his Suburban with the flip.
    http://www.echobit.com/cgi-bin/echobit/showcase-public.cgi?showcase=1&membername=DAVID
     
  3. 89GMCSuburban

    89GMCSuburban 1/2 ton status

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    Awesome, thanks! /forums/images/graemlins/thumb.gif
     
  4. Pookster

    Pookster 1/2 ton status

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    So, the longer the wheelbase, the greater the shim degree?

    Im still trying to fix mine, I've relocated the transfer case back up into stock location, with 8 degrees, its way too much on my 87 k5. So now Im getting ready to do a 5 degree.. what do you think?
     
  5. BorregoK5

    BorregoK5 1/2 ton status

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  6. supersize75

    supersize75 1/2 ton status

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    I have your shacke flip, 2,5 inch lift springs and a 14 bolt rear, the pinion is pointed pretty high so I just got a cv, do I still need to shim the rear, I really dont want to lift the rear up any more /forums/images/graemlins/confused.gif
     
  7. 88K5Jimmy

    88K5Jimmy 1/2 ton status

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    I was told by High Angle Driveline that you want the pinion 2* down from the angle your d-shaft is at to account for axle wrap when taking off.
     
  8. BorregoK5

    BorregoK5 1/2 ton status

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    88K5Jimmy, nailed it. The flip tilts the pinion up near perfect for a CV shaft. If you did any shimming it would be no more than 2 degrees. What you want is a slight angle down from the pinion being directly inline with the shaft. It should lift up with a little throttle and sit directly inline with the shaft under load. Did you end up painting your truck candy apple red?
     
  9. supersize75

    supersize75 1/2 ton status

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    bright red pearl /forums/images/graemlins/thumb.gif,


    So I should be ok with my angles?
     
  10. BorregoK5

    BorregoK5 1/2 ton status

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    Nice color! You should be very close with your pinion angle. Always check the angles just to be sure. Three trucks with the same combintion of parts could all sit with 3 different angles.
     
  11. Pookster

    Pookster 1/2 ton status

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    shimming the rear wont gain particularly much, maybe 1 cm.

    I've become an expert at shim changing. I can do both sides in 15 minutes!
     

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