First Gen Spring lengths

Discussion in 'The Garage' started by yellowK20, Oct 16, 2003.

  1. yellowK20

    yellowK20 Well Lubricated Premium Member GMOTM Winner

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    How much shorter are they than 2nd gen ??? whats involved in using 2nd gen springs on a first gen truck?? has anyone done this ?? I have a set of 8" skyjacker springs for a 2nd gen and would like to use them on my "new" 69 longbed I tried a search but all I could come up with was that the first gens were shorter no actual numbers /forums/images/graemlins/confused.gif
     
  2. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Are you talking about fronts or rears?

    Fronts on a 1st Gen are 44"
    Rears are the same as any other K5.
     
  3. 69K5

    69K5 1/2 ton status

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    if its for the rear is the 69 another k20? cause then you are gonna need the longer springs. 56" iirc. front is still the same as a first gen k5. 2nd gen front springs are 3" longer . back is the same provided its a 1/2 ton or blazer at 52" long


    69k5
     
  4. marv_springer

    marv_springer 1/2 ton status

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    Rob and I experimented with a "mixed bag" and built him a set of springs from a rear CJ-7 spring pack. His are really too soft to be safe... but he seems to like them that way /forums/images/graemlins/confused.gif.....

    Anyway, they flex like crazy /forums/images/graemlins/eek.gif
    [​IMG]

    Marv
     
  5. Triaged

    Triaged 1/2 ton status

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    I have a set of 4" TC EZ-Rides for a 2nd gen that I am in the process of installing on my 1st gen in place of some 1st gen 4" Ranchos.

    I ground off the rivits that hold the front spring hanger on and moved it forward one hole on the body mount (about 1.8"). I am going to make some longer shackles to take care of the tail end of the spring. If everything works out how I've planned the axle will be moved forward just a bit and I will have a better shackle angle (along with 295# springs to replace the stiff 720# Ranchos!). I almost have one side done but I don't get much time to work on it so it might be a while till I'm done.
     
  6. Triaged

    Triaged 1/2 ton status

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    Marv,
    Are those springs the same length as stock and just softer or did you go moving around the mounts?
     
  7. marv_springer

    marv_springer 1/2 ton status

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    The CJ-7 springs are a bit longer.... maybe 1.5" or so... Makes the shackle angle kick back a little..

    I think we re-drilled the center pin to move the axle forward just a tich, and then added several leaves to stiffen up the rate. BTW, we estimated the rate by the old "have the biggest guy there stand on the leaf pack - while the lightest guy there measures the deflection".... We thought we had 250 or so lb/in... but to ride in it - they feel real soft... /forums/images/graemlins/laugh.gif

    Oh... and I think Rob had to whip up some custom bushings for them too...

    Marv
     
  8. yellowK20

    yellowK20 Well Lubricated Premium Member GMOTM Winner

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    cool it can be done !!! I've been wondering about moving the spring hanger forward and longer shackles were in the plan anyways /forums/images/graemlins/thinking.gif /forums/images/graemlins/thinking.gif
     
  9. Chris Demartini

    Chris Demartini 1/2 ton status

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