how to measure leaf springs....

Discussion in 'The Garage' started by RootBreaker, Jun 1, 2006.

  1. RootBreaker

    RootBreaker 3/4 ton status Premium Member GMOTM Winner

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    Ok so this is going to be a long post.. the jist.. how do you tell what size lift leafs you have????


    so now the easy question is out... the long post :haha:

    back in 1997 I had a guy lift my truck.. so it would pass nj strict lift laws (and I had a dirt driveway and not the tools like I do now :bow: )

    so he put 12" rear leafs on the truck and 13" fronts
    I already had a 3" body lift
    was going with rockwells and 53" michelins.... well nj changed their lift laws so I had to bring the truck down... it sat for 7 years..then viola end of 2004 on the road....


    I went from this (without body lift)
    [​IMG]


    just realized the rear block is already removed from the drivers side.. and pass side is up in the air via hilift jack...
    this will give you an idea of how high the back was...
    [​IMG]




    to this
    [​IMG]





    now here is what I did...

    I took the 13" front leafs off.... put superlift softride front 6" leafs
    removed the factory tapered block from the back
    the block is like 2.5" on one side and 2.75" on the other....

    howevever if you look at the pics.. I supposedly still have the 12" rear leafs on the truck... how can I tell if they are really 12's or if it was 12" with my stock block equaling say 10" leafs plus my block?????

    that would mean remove block and it is like close to 9" rear....



    any help... just curious... a bud was over and I told him my rear 12" leafs were still on the truck.. and we were looking and the math isnt adding up anymore??????? :crazy:
     
  2. RootBreaker

    RootBreaker 3/4 ton status Premium Member GMOTM Winner

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    cmon 19 views!!!! no replies????
     
  3. resurrected_jimmy

    resurrected_jimmy 1/2 ton status

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    so right now you have 6" front springs, unknown rear springs and a 3" body lift?
     
  4. RootBreaker

    RootBreaker 3/4 ton status Premium Member GMOTM Winner

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    6" front springs
    unknown rear

    that is it....

    my server was down and I have only a few bigger pics of my truck...
    this was with the 12" susp and 3" bl...
    [​IMG]
     
  5. 79k20350

    79k20350 3/4 ton status

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    you should have 8" rear springs... witha 12" kit the rear springs are 8" not sure aboout the 2.5" bolck though...
     
  6. bigbadchev84

    bigbadchev84 1/2 ton status

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    im not sure they even make a 10" rear spring? i had a set i picked up and called skyjacker to find out what size the were, they told me run a string eye to eye then from the string to the bottom of the leaf pack and that is what size it is, if they are off the truck then they will be a couple inches off unloaded.
     
  7. RootBreaker

    RootBreaker 3/4 ton status Premium Member GMOTM Winner

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    Wow forgot about this thread

    Just went out... string from eye to eye and measure down to bottom of pack is 9.5" with full weight of truck resting on it.

    Ground to top of well is 44.5" and front is 45.75".. maybe ord flip 2in level me out...
     
  8. GreenieK30

    GreenieK30 1/2 ton status Premium Member

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    The springs don't look like 12" and 13" in those pictures. Can you post new pictures of the actual rear springs?


    11 year old thread.........:haha:
     
    Last edited: Oct 28, 2017
    nvrenuf and RootBreaker like this.
  9. RootBreaker

    RootBreaker 3/4 ton status Premium Member GMOTM Winner

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  10. RootBreaker

    RootBreaker 3/4 ton status Premium Member GMOTM Winner

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    here is what the front used to look like.. sold them a long time ago..

    kid_tire.jpg
     
  11. RootBreaker

    RootBreaker 3/4 ton status Premium Member GMOTM Winner

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    with 3" BL and the 13" front leafs and 40" hawgs. guy that installed them was having an issue that after truck sat on leafs, total weight still had leafs sitting at 13" so he sent them out to be lowered to 12" but had issues.. its a long story..

    but he said they were 13" front and 12" rear (musta been 9.5" leaf and 2.5" block..)

    drivewayornament2.jpg
     
  12. K85 Octane

    K85 Octane Tacklin' Fuel Premium Member GMOTM Winner

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    I'm confused what it is you're trying to do. If you are running 6" fronts, go buy 6" rears. Install and be happy. If it isn't what you want, throw the 2.5" block on or a zero rate and more the rear axle back, it will look more centered.
     
  13. RootBreaker

    RootBreaker 3/4 ton status Premium Member GMOTM Winner

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    I'm contemplating lifting my truck up more. If I go with shackle flip that is great... however I'm thinking of going with leafs instead... so I know I have 6" up front.. so I can go 8" for 2 more inches... they don't make 10" so it is either 8" or 12" and 12 is just too much as I have had that before....

    so step 1.. figure out what I have.. if I had 6" in back I CAN get 8" rear... simple.. figure out what you have first..

    ive been thinking of getting 39.5 boggers or 42's and they will not fit on what I have now so trying to go back and figure out what I have...
    that's all simple... easy peasy...
     
  14. RootBreaker

    RootBreaker 3/4 ton status Premium Member GMOTM Winner

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    yeah I know funny... and even though 11 year old thread.. ive had the truck for 31 years!!!!!!!! :pimp:
     
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  15. fourwheelerjeff

    fourwheelerjeff 1/2 ton status Staff Member Moderator

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    I don't think this would apply to rear springs, even stock rear springs have some arch to them.
     
  16. fourwheelerjeff

    fourwheelerjeff 1/2 ton status Staff Member Moderator

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    they (Superlift, Skyjacker, ect) don't make 12" lift rear springs either. 8" is all there is for 52" rear springs and 6" for 56" rear springs.
     
  17. fourwheelerjeff

    fourwheelerjeff 1/2 ton status Staff Member Moderator

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    do your rear springs have a number on them, like 01-322?
     
  18. RootBreaker

    RootBreaker 3/4 ton status Premium Member GMOTM Winner

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    Ive got 56in rear... they cant be 6in ..else there woulda been 6in block...

    These are custom... not superlift or anyone
     
  19. RootBreaker

    RootBreaker 3/4 ton status Premium Member GMOTM Winner

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    No numbers
     
  20. RootBreaker

    RootBreaker 3/4 ton status Premium Member GMOTM Winner

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    Wow front still do.. crap i bought superlift lol... they flex well 20171028_151432.jpg
     

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