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Things to consider with a 6" lift...

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by fortcollinsram, Feb 6, 2002.

  1. fortcollinsram

    fortcollinsram 1/2 ton status

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    Things to consider with a 6\" lift...

    Well, I will be installing a 6" lift on my K5 in the VERY near future (have the lift, just gotta install the thing) and I was wondering about a few things...I have already purchased the extended brake lines and have the front ones installed...I also got a raies steering arm when I ordered my lift...As far as lengthening the driveshats goes, can I get away with not doing it for a while if I mainly drive on the street? I have a 14BFF planned and arranged but that won't go in for like 4 -5 weeks and since the 14bff will requires a new driveshaft anyhow, can I get by on my stock driveshaft until I put the new axle in? Again, untill I do the 14bff, it will mainly be street use and I already have my t-case dropped so what are your ideas on this gang?


    Thaks a bunch...

    Chris

    Was that a speed bump? No, just a Rice Rocket </font color=red> <a target="_blank" href=http://coloradok5.com/gallery/fortcollinsram>My 87 Blazer</a>
     
  2. NoSmog73

    NoSmog73 1/2 ton status

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    Re: Things to consider with a 6\" lift...

    If you have the lift and the 14ff then I would just wait till you do the switch.. I think you would still be wise to extend the driveline maybe just the rear (save the money by not doing the front to) I think 6" will be pushing the risk factor to much IMO...I too will be putting the 6" lift in soon and will do the line at the same time also...later mike
     
  3. Hossbaby50

    Hossbaby50 3/4 ton status

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    Re: Things to consider with a 6\" lift...

    You could get a new driveline (rear) made for the 6" lift and the 14bolt. Get it set up for the extra length of the lift and the 1350 yoke for the 14ff. Then get a #447 ujoint from Napa and run your 10 bolt until you get ready for the 14ff. I know its winter up here, but you could always remove the front drivshaft until you get the $ to lengthen it.

    My Chevy isn't broken, its just out of gas.
     
  4. k5king

    k5king 1/2 ton status

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    Re: Things to consider with a 6\" lift...

    i know yur itching,but wait till you do the rear swap,,your going to have to take it out when you do the spring's anyhow so just save the trouble of doing it twice and wait.it's gonna cost about $150 to get yur shaft lengthened and balanced from just about any shop,,not much more than that and you could get a whole new shaft with spicer joints to fit your 14FF.
    WAIT

    <font color=purple>ANYBODY LOSE THEIR JEEP????????[​IMG]
    I JUST FOUND ONE UNDER MY BLAZER!!!![​IMG]
    [​IMG][​IMG]</font color=green>
     
  5. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Re: Things to consider with a 6\" lift...

    Why not just install the 14 FF at the same time, right now? You may not even need a new driveshaft! On a K5, you most likely will, but my friend put a 6" lift on a K10 shortbox a few months ago and he still has his stock shaft in that.

    447 u joint and the stock shaft works just fine.

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

    fortcollinsram 1/2 ton status

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    Re: Things to consider with a 6\" lift...

    Thats all cool but I don't havb ethe 14bff yet...the dude i am buying it from doesn't ahve any in my ration (4.56-4.88) so I am waiting on that...Basically, can I run my stock shafts on the STREET with a 6" lift? There wil be NO flexing goin on...


    Thanks,
    Chris

    Was that a speed bump? No, just a Rice Rocket </font color=red> <a target="_blank" href=http://coloradok5.com/gallery/fortcollinsram>My 87 Blazer</a>
     
  7. Mudstud

    Mudstud 1/2 ton status

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    Re: Things to consider with a 6

    I have a different set up- 76K5 TH350 and 203. Stephen has told me this is a long combination but when I raised mine 6" (see link below for deatails) I did not lengthen my driveshaft. I still have about 1.5 inches inside the slip yoke in the drive shaft. I did not lower the t-case and vibration is absolutly minimal- about 50-55 mph I get SOME then goes away. The only drag is that the slip yoke has splines exposed now which means that the seal around that area gets pushed out, I have to use a needle grease gun attachment and grease every spline to keep it properly maintained. I will have the shaft lengthened at somepoint but it's not pressing. Check my link below for a couple surprises that we encountered lifting mine.

    Mudstud
    <a target="_blank" href=http://communities.msn.com/OffroadK5s6superliftand33s.msnw?albumlist=2>http://communities.msn.com/OffroadK5s6superliftand33s.msnw?albumlist=2</a>
    76K5 6" with 33s, sb400/350/203parttime/3.73-D44/GM12bolt
     
  8. BlueKnight

    BlueKnight 1/2 ton status

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    Re: Things to consider with a 6

    No Vibration? no lengthening? WOW you were lucky. I put my 6" lift in and didnt lengthen the lines and it worked fine. I did however get vibes and started loosing ujoints every two months. I did lengthen the rear drive line but not the front. I hada custom CV joint installed and I did lower my t case a bit. I dont have vibes and my ujoints last along time now. As for lift and vibes it also depends if you have a TH350 transmission or a TH400 trans. The TH400 is shorter than the TH350 and gives you better drive line angle. Also shim the pumpkin in the back. Tip it up.

    <font color=purple>79' K-5 396cid 600hp, TH350, NP203</font color=purple>
    <a target="_blank" href=http://blueknight.alloffroad.com>http://blueknight.alloffroad.com</a>
     
  9. fortcollinsram

    fortcollinsram 1/2 ton status

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    Re: Things to consider with a 6

    Mudstud,

    your clicky no worky..."page not found" error

    Chris

    Was that a speed bump? No, just a Rice Rocket </font color=red> <a target="_blank" href=http://coloradok5.com/gallery/fortcollinsram>My 87 Blazer</a>
     
  10. 84Blazr

    84Blazr Registered Member

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    Re: Things to consider with a 6\" lift...

    Whats the ballpark price for lengthening the stock driveshaft or for a custom lengthened driveshaft??

    <font color=red>Wheelin' and Jet skiin'..........Life is GOOD!</font color=red>[​IMG]
     
  11. CaptCrunch

    CaptCrunch 1/2 ton status

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    Re: Things to consider with a 6

    I think the most honest way to answer this question is MAYBE! Every truck is a bit different. Plus if you are going 6" all around or are you gonna run a bit more lift like 7 or 8" to compensate for the saggy butt delemia? First off I will assume you have a slip yoke setup, which means you have a harder job trying to keep vibes away. You can drop the tcase, but that is also gonna hurt your front angle. A lot of guys with the 208/241 model tcases have to grind their CV joint on the frt d-shaft and then use 4 or so degree shim up front. The shim hurts overall alignment so the smaller you can go, the better. Also you will almost certianly need to get a 1" driveshaft spacer from Superlift. Rocky mountian suspension has them in stock and have treated me well. Last thing up front to remeber is if you have the stock exhaust Y pipe it is gonna be in thway so you will need to modify the exhaust most likely. Out back chances are you are gonna be short and the vibes as I said are gonna be tough to counter with a slip yoke. I'd highly recomend waiting to do the lift till you can afford one of Jess's one ton CV shafts. This way you can leave the tcase up and this will allow you to use less shim up front as well. Also it will make your vibes non-existant. Another item to keep in mind is that you will have less spline contact with the output shaft which makes the risk of damage to the slip yoke or output shaft higher.

    I guess all and all... I'm the do it once, do it right kinda guy. I made some errors in judgement on my 6" lift and am now getting them fixed up. One last thing... with a 6" lift I think a 2" drop pitman arm is a good idea to make the drag link straight instead of at an angle. But that's my $.02 worth

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  12. CaptCrunch

    CaptCrunch 1/2 ton status

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    Re: Things to consider with a 6\" lift...

    I would get a longer driveshaft from a junk yard and have a driveline shop cut it and balance it. One from a reg cab, long bed pick would be a good canadate. Shortening a shaft is much cheaper and easier... my place has done them in the past for anywhere between 60-140 bucks depending what I had and needed.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  13. Mudstud

    Mudstud 1/2 ton status

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    Re: Things to consider with a 6

    Sorry man. Looks like they had moved my page. Try it now. I have true dual exhaust all the way back so the y pipe was a non issue for me. My set up resulted in having 2 degrees difference in the out put of the t-case and the pinion. No more than 2 is suggested.

    Mudstud
    <a target="_blank" href=http://communities.msn.com/OffroadK5s/6superliftand33s.msnw>http://communities.msn.com/OffroadK5s/6superliftand33s.msnw</a>
    76K5 6" with 33s, sb400/350/203parttime/3.73-D44/GM12bolt
     
  14. SAVAGE1

    SAVAGE1 1/2 ton status

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    Re: Things to consider with a 6\" lift...

    <blockquote><font class="small">In reply to:</font><hr>

    can I get by on my stock driveshaft until I put the new axle in?

    <hr></blockquote>
    This is exactly the route I took. I lifted the truck 6 inches, dropped the Tcase and wheeled it lightly. Five months later I destroyed my 10 bolt so in when the 14 bolt. I had a shaft made with 1350 yokes all around. Drive shaft angles and slip yoke clearances always vary in different trucks, but I think you should be fine until you get the 14 in and have a new shaft made.

    Rod
    Alameda, CA
    85 K5 6"ProComp 35"Boggers 14Bolt/ Dana44 4.10's
    <a target="_blank" href=http://coloradok5.com/gallery/K5Jungle>http://coloradok5.com/gallery/K5Jungle</a>
     
  15. SAVAGE1

    SAVAGE1 1/2 ton status

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    Re: Things to consider with a 6\" lift...

    For the front I used a driveshaft spacer made by Superlift I think. Costs around $50 and goes between the shaft and Tcase. I get no vibes so I'm happy with it.

    Rod
    Alameda, CA
    85 K5 6"ProComp 35"Boggers 14Bolt/ Dana44 4.10's
    <a target="_blank" href=http://coloradok5.com/gallery/K5Jungle>http://coloradok5.com/gallery/K5Jungle</a>
     
  16. burbBoy

    burbBoy 1/2 ton status

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    Re: Things to consider with a 6\" lift...

    I know of atleast 3 trucks i wheel with almost every weekend that have 6-8" lifts and no drive shaft lengthening of any kind. Its all in the angle of your rear diff. Droping the axle six inxhes lower only requires a 1/4 inch longer shaft on a fullsize long box truck if you do some simple math calculations. On the front all you have to do is grind away a the "saftey" tabs on the cv part of the shaft to get some extra clearance. I havent had any problems at all with vibration....although up here i dont do much over 60 anyways.

    Brian
     

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