OK. I am chasing this death wobble and have pretty much checked everything that I can think of. I have put new synergy ball joints in, replaced the tie rod end on the pitman end of the drag link, long end was replaced earlier. Replaced the frame end of the track bar as it was getting some slop in it. The track bar is an RK track bar with what I call a heim style joint on axle end and their no twist joint on frame end. Have the 9/16" bolts in everything already and all torqued to 125 lbs.

I was starting to notice some wobble before I did these things, LS swap and 6l80e trans, then I put in synergy 4.5" springs in front (replaced the procomp 4" springs) to level out front end and running the tires and wheels that are in my signature. I do not see any movement in the control arms or other tie rod ends either. I really only have the death wobble after going over a bridge that has a seam at an angle to the road and then another seam that runs perpendicular to the road about 10-12 yards after that. Unit bearings feel tight.

Can castor have anything to do with it since I put the taller springs in, although it sits just a tad taller than it did with the 4" procomps. I am using the AEV control arm lowering brackets and they were on prior to this.

So any help or suggestions would be great.

 

Recheck your Trackbar. If the the holes are wollowed out the trackbar may be moving. Have someone turn your steering wheel back and forth while you inspect both ends of the trackbar closely. Watch for movement within the Trackbar bushings as well. The bolts may be tight but the bushing itself may be coming apart.

 

Yes, caster is one of the factors that has an effect on death wobble. When you lifted your Jeep the caster increased unless you also used some aftermarket control arms that correct the caster with a lift . Teraflex is one of several companies that offer this product that reduces caster to the original value with a 2-1/2 to 3" lift.

 

Dude, not trying to be negative but this is flat wrong.

First off caster effects handling, in relation to how the axle sits perpendicular to the ground.

Lifting decreases caster, it doesn't raise it.

 

I think he meant to say decreased. No caster does not have a direct effect on DW but low caster sure doesn't help. Same with tire issues.

 

Well here is the update. Still have it, may even be getting worse. I have the AEV drop brackets, may be the older style as I only have 2 holes in the brackets and the newer ones have 3 holes. On mine I had them in the upper set of holes and tried the lower holes and it seemed to make it worse, so back to the top holes. I have replaced the remainder of the tre's, re torqued everything. Checked my unit bearings, checked steering box for movement. Only thing I have found is that my steering damper is toast. Although everything I read says if all is tight and right no stabilizer is needed but this is all I have left to replace and check.