It is possible to get vibrations and wear out u-joints with a Rubicon. Even though it has a fixed yoke, the stock shaft is not a double cardan. Only a problem with massive lifts though. With a 3.5" lift I don't think you will have any problems.
As answered above, no, no sye. You will likely have vibs with the 3.5" kit (closer to 4-4.5"). Don't waste your money on a t-case drop kit. Just use washers and the appropriate length bolts will the vibs go away. That way you aren't dropping it any more than necessary.
2004 Rubicon - 4.0 - 5 speed manual - Rough Country 4" Stage II lift, RC front adjustable track bar, 2.2 shocks, 33x12.5x15 Goodyear MTR with Kevlar on Crager soft 8's, 4 Hella Black Magics, Edge Trail Jammer with Intake, JL TR 2-ways in the pods, Kenwood Excelon deck in the dash, Rough Country Stinger & Winch Plate, Trail Gear rear bumper w/ tire carrier, HiLift, Rock Krawler X Factor Plus Steering
As others have said you don't need a SYE, but you may want to look into a CV drive shaft, like one from Tom Wood, that is made for the Rubicon 1330 u-joints to avoid any vibrations. And yes you can get vibrations with a 3.5" lift, even from shorter lifts in fact. If you got a CV drive shaft, then you would not need a t-case drop.
2003 Jeep Wrangler Rubicon
4.0L, 42RLE, Dual Tops, Full Doors, JKS Front Disconnects, Cragar Soft 8 Black Wheels, 33x12.5x15 Goodyear Duratracs, .75" Front Coil Spacers, Bushwacker 6" Flat Fender Flares, Skid Row Steering Box Skid, LubeLockers, Rubicon Locker Mod, OBA, Cobra 19 Ultra III CB, 3' Firestik, Rough Country 2.2 Steering Stabilizer, RC 1.25" BL, RC 1" MML, RC Grab Handles, Fog Lamp Bent Pin Mod, 4" Apline S Series Speakers, Kenwood Excelon 6.5" Speakers, 6.5" JL Audio 6W3V3 Subwoofer (in center console) w/MTX Thunder 202 amp, IPF H4 Headlight Housing, Sliverstar H4 bulbs.
Exactly. ANY vibe is bad and will destroy parts faster than you can replace them. I can guarantee that the double cardan shaft (and adj. control arms needed to adjust pinion angle) will be cheaper in the long run than running around for a year with minor vibes.
Option 2.) Lift the Jeep, remove the rear driveshaft then put it in 4HI. Now you have a lifted front wheel drive...
Life with Christ can be explained like a Jeep...
Being in the Word... grows your tire size.
Prayer... gains more ground clearance.
Fellowship... Is like having a good spotter.
The more of these you have... the easier it is to get over obstacles in your path.
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