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56" springs and axle location

Discussion in 'The Garage' started by bp71k5, Sep 8, 2006.

  1. bp71k5

    bp71k5 3/4 ton status Premium Member

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    After the lift, I need to move my axle back a bit to re-center. I've read the 56" springs will move it back, but I want to make sure the amount of lift is the same (2" springs) and find out how much farther back will the axle move?
     
  2. JK5

    JK5 1/2 ton status GMOTM Winner

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    When I installed my 56's, I re-drilled the the holes back an 1 1/2"s.
    I used my drill press, lots of coolent and ground the taper on the drill so it was flatter.
     
  3. dremu

    dremu Officious Thread Derailer Premium Member

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    The 56"s are offset by 4", i,.e. the short leg is the same length as a 52" and the rear leg is 4" longer.

    Now, I donno much about first gens, so your rear springs may be different, however flipping the 56"s around on a stock second-gen generally makes the rear diff want to become one with the gas tank upon compression, so unless you're running crazy lift, you may want to re-drill or do a zero rate.

    -- A
     
  4. bp71k5

    bp71k5 3/4 ton status Premium Member

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    Ah, yea 4" is too much. 1-2" would be plenty. Maybe just drilling the perch is a better way to go. Thanks!
     
  5. redneckdude

    redneckdude 1/2 ton status

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    either that or a set of zero rates.
     
  6. micah

    micah 1/2 ton status

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    if you install the spring in stock position (front eye forward) the axle will be in stock location... reversed moves the axle back 4 inches.

    52 inch springs have the center pin at 26/26
    56 inch springs have the center pin at 26/30
     
  7. AllamericanK5

    AllamericanK5 1/2 ton status

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    I dont mean to highjack or ne thing but i have a question related. If you have a Shackel flip and your shackel is stright up and down with the stock 52s and you were to put the 56s in would you still have to redrill, or would it be perfect for the shackel angle?
     
  8. txfiremank5

    txfiremank5 1/2 ton status

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    Your stock shackle angle should improve, but most folks swap the shackle flip to the other sides of the truck. (EI: pass to drivers side etc) to work with the added length of the 56's. However, you can still keep a better angle and get some better movement by using a longer shackle in it's (the stockers) place.
     

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