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Thread: F250/f350 front 4 inch lift springs.

  1. #1
    Registered User zebvance's Avatar
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    F250/f350 front 4 inch lift springs.

    My buddy bought these leafs from a guy off full size bronco and was told they were rear 4 inch lift springs for 86-98 full size bronco. Well turns out the guy lied and my buddy got screwed. So I'm selling them for him now for What they REALLY are. After running the part number I found them on jegs.

    Here is the link: http://www.jegs.com/i/Skyjacker/825/F840S/10002/-1


    They are skyjacker 4 inch lift FRONT springs for :
    1980-1998 f250 pick up 4 inch lif 1986 -1998f350 pick up straight axle 3-4 inch lift
    1980-1985 F350 pick up


    They have NEVER been used. He wants 200 + shipping or free pickup.







    1988 Comanche auto, 4.0, 4x4, 8.8 rear trussed, Dana 30 trussed, SYE np231, Serious Offroad long arms, 9.5" of lift, 35's, lockers

  2. #2
    Resident Ricer Sparling's Avatar
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    How do these work on TTB and solid axle trucks?
    '91 Bronco 351w, ZF5, D44 TTB, 9" rear swap with disk brakes, 37" toyos, method wheels, mastercraft seats, A/C and heat

  3. #3
    ill be your pickup man
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    Why wouldnt they?
    92 YJ
    04 F-150 4x4
    11 F-250 4x4

  4. #4
    Resident Ricer Sparling's Avatar
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    physics. ttb springs are way too stiff for a solid axle because ttb makes a lever on the spring. if you put solid axle springs under a ttb truck they would sag a whole lot and maybe not hold the truck up.
    '91 Bronco 351w, ZF5, D44 TTB, 9" rear swap with disk brakes, 37" toyos, method wheels, mastercraft seats, A/C and heat

  5. #5
    ill be your pickup man
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    Superlift runs the same front leafs as well for 250 and 350
    92 YJ
    04 F-150 4x4
    11 F-250 4x4

  6. #6
    Yo soy tu papa! Doug Krebs's Avatar
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    Quote Originally Posted by Sparling View Post
    physics. ttb springs are way too stiff for a solid axle because ttb makes a lever on the spring. if you put solid axle springs under a ttb truck they would sag a whole lot and maybe not hold the truck up.
    opps I may want to retake reading
    Last edited by Doug Krebs; 03-06-2013 at 12:16 AM.
    1988 Blazer...RIP

  7. #7
    Resident Ricer Sparling's Avatar
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    ya. spring rates should be different. those springs are going to be a compromise for something. maybe both.
    '91 Bronco 351w, ZF5, D44 TTB, 9" rear swap with disk brakes, 37" toyos, method wheels, mastercraft seats, A/C and heat

  8. #8
    Registered User robertf03's Avatar
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    is the truck jammed inside a parking garage? Thats the only way I can see the ttb arm doing damage. different valved damper, sure.
    ...

  9. #9
    Come and Take it BroncoJo's Avatar
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    Sparling - they are ****ty skyjacker springs and skyjacker only gives a **** about fit, not spring rate or ride quality
    Born to Kill

    Quote Originally Posted by RCcola55 View Post
    I just watched a spider dominate a fly on the wall outside, i thought would would travis do? and i did the opposite, spider lives!

  10. #10
    Resident Ricer Sparling's Avatar
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    Quote Originally Posted by robertf03 View Post
    is the truck jammed inside a parking garage? Thats the only way I can see the ttb arm doing damage. different valved damper, sure.
    If the damper needs different valving then why don't the springs need different ppi or spring ratings? Dampers don't hold anything up. Aren't you an engineer? punch some numbers in a spring rate calculator.


    Quote Originally Posted by BroncoJo View Post
    Sparling - they are ****ty skyjacker springs and skyjacker only gives a **** about fit, not spring rate or ride quality
    I guess. Maybe I'm crazy for thinking it wouldn't take much for thinking a spring company to have different spring rates for ttb and solid axle setups.
    '91 Bronco 351w, ZF5, D44 TTB, 9" rear swap with disk brakes, 37" toyos, method wheels, mastercraft seats, A/C and heat

  11. #11
    Registered User robertf03's Avatar
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    my ti-30 will only do coil springs, not leaf springs. I guess I need to buy a better spring rate calculator


    oh, and that 200 PSI of nitrogen in a damper will provide some lifting force.

    My ride height changed about 3/8" when going from rs5000 to rosenbilsteinburg 7100s
    Last edited by robertf03; 03-06-2013 at 08:05 AM.
    ...

  12. #12
    Resident Ricer Sparling's Avatar
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    Yours might, most don't. All the shocks on the shelves at Advance will do nothing to hold a vehicle up unless they are load assist.
    '91 Bronco 351w, ZF5, D44 TTB, 9" rear swap with disk brakes, 37" toyos, method wheels, mastercraft seats, A/C and heat

  13. #13
    Registered User zebvance's Avatar
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    Haha I just saw this. I have no idea if they will work on that scissor axle. All I know is im trying to help a buddy that got screwed on a deal. They are in good condition though.
    1988 Comanche auto, 4.0, 4x4, 8.8 rear trussed, Dana 30 trussed, SYE np231, Serious Offroad long arms, 9.5" of lift, 35's, lockers

  14. #14
    Registered User zebvance's Avatar
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    Pending sale.
    1988 Comanche auto, 4.0, 4x4, 8.8 rear trussed, Dana 30 trussed, SYE np231, Serious Offroad long arms, 9.5" of lift, 35's, lockers

  15. #15
    Tommy sucks Sharpe's Avatar
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    Quote Originally Posted by Sparling View Post
    If the damper needs different valving then why don't the springs need different ppi or spring ratings? Dampers don't hold anything up. Aren't you an engineer? punch some numbers in a spring calculator
    Donny you're out of you element! Are you seriously comparing parts store shocks to adjustable Bilsteins?
    On the 8th day god created the Super Swamper TSL and said "go forth and kick ass"

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