I finally dealt with the death wobble! It’s gone. But now I have a Jeep that feels like it has rear wheel steering under hard acceleration. This afternoon while merging onto a freeway. I hit the gas pretty hard to merge and change lanes. The Jeep got so squirrelly that the traction control came on. All of the control arms are tight and in good shape. The rear track bar has been raised with a Synergy relocation kit. The Jeep sits about an inch lower on the passenger side with only about an eighth of a tank of gas. I have Rock Krawler 3 1/2 inch springs. Bilstien shocks and Rubicon control arms. If you have had this issue I would really like to know what you did to get it fixed. Thanks in advance for your help.

 

Install a 2.5" metalclaok game changer lift with the rocksport shocks.

 

My Jeep used to lean and it went away after I added sway bars. I think mine may lean 1/4” or less but it’s so little that I don’t care.

I would do as dirtman suggested though, use MC control arms so you can adjust everything. A spring is a spring (minus the MC dual rate which won’t affect the lean) so the RC springs are probably fine unless you have a reason to need more extension from your current springs.

 

Since your profile says you have a "3.5" lift with adjustable control arms" I'm guessing that when you say "Rubicon" control arms maybe you mean "Rubicon Express"? Just confirming you have rear adjustable arms there regardless of brand. The squirrely rear end is an odd comment in general. The only times I've seen one of these things with a squirrely rear end was 1) when I had a broken rear TB mount or 2) when really getting on the skinny pedal in a jeep with either a V8 or supercharger . That 3.6L doensn't have enough guts to get squirrely due to normal power. I'm thinking the issue is really the lean which is creating a weird weight/power distribution with open diff and triggering the ABS. You added a raised TB bracket in back. Do you have an adjustable rear TB as well? Is that axle dead center under the jeep? It doesn't take being off much to create a bit of a lean to one side. 1" difference is pretty big, and that isn't something to chalk up to a lazy spring.

 

I do have Rubicon Express in the rear. They are adjustable. On the alignment rack they are within .1 degree. Side to side they are within .125” of center. The track bar is not adjustable. That little V6 is bone stock. Not even an after market intake. It is An open diff too. I’m going to loosen everything up and rock it back and forth, let it settle and tighten everything up again. Thanks to all who are in here helping me with this. Sincerely

 

I'd measure how far you are off side to side with that axle being centered under the jeep. I suspect you are off a bit and that isn't helping the lean. If you're off then you're going to be looking at an adjustable rear TB to remedy that.

 

This morning I crawled under the Jeep and loosened all of the control arm bolts. I also loosened the track bar bolts. Then I rocked the Jeep as violently as I could while everything was loose. I tightened everything back up and took it for a short drive. Then I measured the height of each rear fender at the centerline of the axle. With a full load of fuel the passenger side was about 1/2 inch lower than the drivers side. It’s highway manners are better but still not what I want.

 

I wouldn’t focus too much on the lean. It’s not a huge deal, simply cosmetic. One thing to try though when you measure for the lean: put your transmission in neutral and take off your ebrake (if you’re on level ground). Measuring the height with the transmission in gear can give you false readings since the torque of the drive train causes the driver side of the suspension to squat a little. I thought I was having leaking issues and after measuring on level ground while in neutral, turns out I don’t really have much of a difference between driver and passenger side.

 

Another thought. When I let off the gas after a pretty hard acceleration the Jeep goes right without any steering wheel movement.

 

That’s a bit of flex steer. Jeeps have a soft suspension, especially if modified. When the body rocks side to side like you’re describing, it’s because the transfer or torque. The body will roll slightly to the left when you let off the gas and that causes a slight right steering input. This is exaggerated with a lifted vehicle since it will have more body roll than a stock one.