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  • lifting the yj

    I'm looking to lift my 93 yj and am a little confused. If I get a kit that includes a transfer case drop is that all I need to keep things vibration free? I'm only looking for 2 or 3 inches

  • #2
    Yep. Jeep pending, some also require some rear axle shims to help lift the pinion to point to the t-case.

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    • #3
      Thanx LeadFoot, I appreciate it.

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      • #4
        I did a simple black diamond add-a-leaf and stabilizer and bought the transfer case drop kit from skyjacker. It worked out fine. Gave about 2 inches so I could put 31s on there. No problems.

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        • #5
          well it all depends, some times you need a sye kit, and sometimes you dont.. i have a 6" lift and no sye because i dont get any vibration other than a little at 40mph but once i hit 43 its gone.. but then again i have heard of people putting on a 3" and had crazy vibration, so they put the sye kit in and it got rid of it... now OMIX makes a kit which has been selling like crazy and i havent heard one bad thing about it yet.. http://www.4wd.com/productdetails.aspx?partID=15547

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          • #6
            Originally posted by Sposato95YJ View Post
            i have a 6" lift and no sye because i dont get any vibration other than a little at 40mph but once i hit 43 its gone..
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            Wait until you MELT a u joint. Vibrations are one problem with big angles on your D/S. What is often forgotten is that a U jont is designed to take up a bit of misalignment and allow a bit of flex. Once we lift and increase those u joint angles we are getting a LOT more movement in the joint. 2-3 inches is not a big deal. Above 5 inches or so and the u joint is working out harder than Richard Simmons. Until I did my SYE and CV shaft I would literally have to grease my joints every couple of days. Trips at HWY speeds required a stop every hour to regrease as it would cook out the grease in the joints. I know this seems excessive but I actually did a run home (after wheeling and then greasing again before the trip home) and I was at 70 MPH for 40 mins before I felt the vibs. By the time I got it off to the shoulder I had NO joint left. One ear of the cross was completely melted off. Another was so bad it had bent into a 45. The joint was so hot it would burn flesh and sizzle on contact. This was a joint 30 days old.

            Doing a joint swap with vehicles whizzing past at full tilt is not my idea of a good time. I guess the main concern about a SYE and CV shaft is if the vehicle is a trailer queen or a DD. SOA and other big lifts can stay with stock 2 joint shafts IF it is not daily driven and does not bind. Realistically though any lift will benefit from a SYE and CV. The reason is the straighter angles and thus longer joint life.

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            • #7
              Originally posted by Sposato95YJ View Post
              well it all depends, some times you need a sye kit, and sometimes you dont.. i have a 6" lift and no sye because i dont get any vibration other than a little at 40mph but once i hit 43 its gone.. but then again i have heard of people putting on a 3" and had crazy vibration, so they put the sye kit in and it got rid of it... now OMIX makes a kit which has been selling like crazy and i havent heard one bad thing about it yet.. http://www.4wd.com/productdetails.aspx?partID=15547
              Pat you have 3 inches of lift. . .3 retarded inches of body doesn't count when you're talking driveline vibe.

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              • #8
                its never enough

                I would agree with exracer. While it is not required to put in the SYE for 2-3 inches of lift, if you are going to be beating on your jeep on the trail or on the highway, it will be beneficial. When I lifted my YJ 4", I installed the t-case lowering kit that came with my lift kit. I had no problems until I had a u-joint failure that snapped the tail housing on the t-case. At that point, I figured I might as well bite the bullet and pull the lowering kit and put in the SYE. I haven't had a problem since. If you are only using your jeep to go to the grocery store down the street, then use the t-case drop. But if you actually drive your jeep, spend the extra bucks to put in the SYE and CV driveshaft... it will save you money/frustration in the long run.

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                • #9
                  Pat, I am now dumber for reading your tech help. haha

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                  • #10
                    If you run the CV and the SYE do you need the drop kit or is that just an added perk at that point?

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                    • #11
                      you could run both but I am not gonna recommend a drop kit for any kind of Offroad use other than dirt roads. They severely sacrafice ground clearance and I am not gonna use one ever again

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                      • #12
                        you could run both but I am not gonna recommend a drop kit for any kind of Offroad use other than dirt roads. They severely sacrafice ground clearance and I am not gonna use one ever again

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                        • #13
                          You DO NOT need to run the drop when running the SYE. That is whole point to doing it over a t-case drop other than the added strength.

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