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Shackle Flip and vibes

Discussion in 'OffRoad Design' started by KRAZIE87K5, Nov 18, 2001.

  1. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    I am thinking about acquiring a set of shackle flips from Steve, but I am SUPER WORRIED about vibrations. I can hit highway speeds with little to no vibes all the way to ~75mph.

    I have a 6" suspension lift, and currently have 4" blocks installed [​IMG][​IMG], and I would love to get them out. Since I have a 6" skyJacker lift, what can i do to account for the remaining 2"? The ORD web site says "ONLY 4 INCH LIFT".

    Will I need to install shims to fix angle issues? I also have the xfer case dropped 1"...

    Any help is appreciated!

    <font color=red>GOT MUD???</font color=red>
    My license plate reads:<font color=blue> 8 YR SUV</font color=blue>
    <a target="_blank" href=http://24.10.209.54/bigolk5.htm>http://24.10.209.54/bigolk5.htm</a>
    454/TH400/NP205 - 14BFF/D60/w/ 4.10s
     
  2. Shorts

    Shorts 1/2 ton status

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    the shims should fix any off angles.

    options on the rear...

    - ORD flip($180?/$160?), 2" springs($200)

    - ORD flip, 2" block($15?)

    - ORD flip, 1.5"-2" add-a-leaf($30-$40), 1" 0-rate block(if necessary)($30)

    <font color=blue>Shorts</font color=blue>

    '94 K1500
     
  3. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Dan,
    Whatever you decide to do, check and note your current angles. When you go with the flip and spring combo or whatever you choose make sure the angles stay the same...

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  4. Greg72

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

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    Well I'm about to do the same type of swap myself in the next few days.....(shackle flip to replace blocks) so I guess you can ask me later how that goes.

    Realistically, the vibration is not going to be from a block lift or shackle flip.....it's going to be a driveline vibration from almost ANY kind of lift. From what I've heard once you get to 4" of lift or above, the vibration issue is going to be there to some degree (no pun intended! [​IMG]) because of the angle of your u-joints and rear pinion.

    The solution seems to be going to a CV-style driveshaft....which is how I'd like to do mine once I get all the axle-swaps, and suspension stuff finalized....

    -Greg72
     
  5. outlaw612

    outlaw612 1/2 ton status

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    Since I havent been able to sell my truck, Im gonna start parting it out. I just bought the cv shaft. What t-case do you have (I forgot)?

    <a target="_blank" href=http://www.geocities.com/outlaw613/K5.html>http://www.geocities.com/outlaw613/K5.html</a>
     
  6. Greg72

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

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    Outlaw,

    Not sure if you're talking to me or not....but mine's a fixed-yoke NP205....[​IMG]

    -Greg72

    '72 K5 Blazer - 427BB/TH350/NP205/6" Lift/35x12.50's
    <font color=blue>See it here: </font color=blue><a target="_blank" href=http://coloradok5.com/gallery/albun38>http://coloradok5.com/gallery/albun38</a>
     
  7. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    The one in the truck is a slip yoke 205 for a TH400 (6 bolt adapter) and the one in the garage is a slip yoke 205 for a TH350 (4 bolt adapter).

    <font color=red>GOT MUD???</font color=red>
    My license plate reads:<font color=blue> 8 YR SUV</font color=blue>
    <a target="_blank" href=http://24.10.209.54/bigolk5.htm>http://24.10.209.54/bigolk5.htm</a>
    454/TH400/NP205 - 14BFF/D60/w/ 4.10s
     
  8. Chaz88K5

    Chaz88K5 1/2 ton status

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    when i first put in the flip kit i had to shim my pinion down 2.5 Deg. and it fixed the problem

    <font color=green>Chaz</font color=green>

    <a target="_blank" href=http://community.webshots.com/user/chaz88k5>http://community.webshots.com/user/chaz88k5</a>
     
  9. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    Everyone here has pretty well laid it out. Keep the same angles, you should drive just the same. I would recommend going with a CV joint at some point in the future. I would suspect that you have fairly low (numeric) gears so your driveshaft speed is pretty low. If you swap up, it'll get worse and the cv joint shaft is more forgiving of that.

    Making the world better, one truck at a time.
    SW-ORD
    <a target="_blank" href=http://www.offroaddesign.com>www.offroaddesign.com</a>
     

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