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4-inch lift

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 6.2L Jimmy, Jan 15, 2002.

  1. 6.2L Jimmy

    6.2L Jimmy 1/2 ton status

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    Hi All.

    Can someone tell me what I MUST change on my truck for a 4- inch lift. Is a transfer case drop kit needed etc?

    1989 GMC Jimmy 6.2L 4x4,1969 Camaro Z/28 502 C.I. B.B.C.
    BLOOD,SWEAT AND GEARS!
     
  2. 3car

    3car 1/2 ton status

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    no trans.case drop.driveshaft is ok,probally just longer brake lines,or you can take them out of their brackets and mount them under the frame rail.4" is real straight foreward.
     
  3. You may or may not have to drop the transfer case to get rid of vibration at speed. Just take the existing 1" spacers and place them between the frame & crossmember (I think!). You also will need a longer steering arm.

    American by birth, Marine by the grace of God
     
  4. denver75k5

    denver75k5 1/2 ton status

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    On mine I had to get new brake lines and lengthin the front driveshaft, I get no vibration out of the rear without the T-case drop, also you want to get a raised steering arm.


    " Wider IS Better!!!"coloradok5.com/gallery/albun51?&page=1
     
  5. ArrowheadK5

    ArrowheadK5 1/2 ton status

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    I'm guessing that it depends on teh individual vehicle, by looking at the varied replies you got?

    "They couldn't hit an elephant at this dist..."
    - General John Sedgwick (1813-1864), last words
     
  6. Hossbaby50

    Hossbaby50 3/4 ton status

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    You need extended brake lines. I have a 2" addaleaf in the rear with a 1" ORD addaleaf and I have to drop the tcase to get rid of my vibs.

    My Chevy isn't broken, its just out of gas.
     
  7. surg82k5

    surg82k5 1/2 ton status

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    With my rugh country lift, i needed extended brake lines, my kit came with a steering arm, I did drop my t case cuz the angle looked terrible before, and I still need to lenghthen my front driveshaft, It is about 3/4 of an inch even with 4deg shims.
    hope this helps
    Sergio

    Check out my new website. <a target="_blank" href=http://www.surg82k5.rockcrawler.com>http://www.surg82k5.rockcrawler.com</a>
     
  8. txbartman

    txbartman 1/2 ton status

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    Some of the parts and mods vary from vehicle to vehicle.

    Things you will definitely have to deal with:
    * brake line brackets need to either be moved or the brake lines replaced with extended ones (I recommend the latter)
    * install raised steering arm - you will not be able to safely drive without this
    * longer shocks

    Things you might have to deal with:
    * extend front drive shaft (I didn't on mine but know others that did)
    * exhaust y-pipe mod if it hits the front driveshaft
    * emergency brake cable may need to be re-positioned
    * t-case may need to be dropped (use existing spacers, no additional parts)

    As far as musts, if there is a problem with any of the "mights" listed above, you must address it. Otherwise you will have issues down the road.

    Brian
    Check out <a target="_blank" href=http://tx85gmcguy.alloffroad.com>My Jimmy</a> with all her projects!
     
  9. Corey 78K5

    Corey 78K5 1 ton status

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    I would lower the t-case since you have a NP 208 with the slipyoke unlike a 203 or most 205's there would be a lot of stress on the rear seal. Like some of the others have said just use the spacers that are on the inside of the framerail on the end of the t-case support bolts. Also if you do this when your done make sure your fanshroud is not touching the fan I'v seen this happen. I would also go with a droped steering arm and either longer brake lines or deppending on the kit you get it may come with drop brackets for the stock lines.
    Corey 78K5
     
  10. 6.2L Jimmy

    6.2L Jimmy 1/2 ton status

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    Hey All,

    Thanks for the replies they really helped me to make my decision. I just hope I can get away with a 2.5 lift with 33x12.5x15 bfg's on the truck, I dont do very much off-roading due to limited areas out here.

    Thanks again.

    1989 GMC Jimmy 6.2L 4x4,1969 Camaro Z/28 502 C.I. B.B.C.
    BLOOD,SWEAT AND GEARS!
     
  11. TopOff

    TopOff 1/2 ton status

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    If that's all your gonna do, why not get a 2" body lift?

    '73 Blazer, 383 Howell TBI, 3/4 ton ARB F&R (3.73), 35" BFG AT&MT. TH350/203 looking for a SM465 conversion
     
  12. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Don't waste your money. Just do the 4". It's just as easy.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     

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