new lift

[dilligas]

I am thinking about swapping my coil spacers for the RC 4" kit on my 06 TJ. Do I need to run a SYE and CV style driveshaft? What is the downside to not using a SYE and CV style driveshaft?

[Jeffb_79]

4" is the magic height for tj's. Some need a sye some don't.
Does the lift come with adj control arms?
More than likely you can get by with just running a tc drop. If you do a 1" mml that should help out as well. The purpose for doing the sye and cv driveshaft is to help your driveline angles.
I say, put the lift in with a tc drop. If you get driveline vibes you'll need to do an sye and drive shaft. You should start saving up for the sye/drive shaft regardless.... some of the clearance you'll gain from the lift, you'll lose with a lowered transfer case.

[dilligas]

thanks jeffb, I was talking to a few guys and they said anything over 3" required a sye and driveshaft. I guess I will have to put it on and find out.

[Jeffb_79]

The problem is that a lot of lifts don't offer the same ride height that's advertised. For instance, the RE 3.5 superflex usually nets closer to 4.5. That's what I ran on my last jeep with a t case drop and had no problems with it.

[dmaxjeep]

just put a RE 3.5" on mine and had to do the TC drop. also had to cut the hole biggerr in the tranny hump for the gear shift to go into 2nd gear. gonna put on new control arms to see if i can get away with out the tc drop.