[tasz54]

I drive a 2003 Wrangler X with a 4" rubicon express suspension lift. Directly afterwards I started getting the "Death wobble" at about 25MPH. Researching the suspected problems, I installed dual steering stabalizers, and a new adjustable front track bar. These fixed the death wobble up to about 45MPH. Afterwards I installed a drop pittman arm, and 4 new 33X12.50 Bf Goodrich A/T, and got my jeep realligned. Following all of that, I havent gotten death wobble, but I do recieve vibrations between 35-40 MPH. And I was hoping someone would have some advice on the vibration problems, and what I could do to fix it. Thanks.

[robncar]

How's your front pinion angle, post lift? Also, are the tires "perfectly balanced"? Are you sure your wheels are seating flush with the hubs (check for factory clips on the wheel studs to hold the rotor hats on; remove them, if present)?

You likely don't need the drop pitman arm, they can cause bump-steer. You want a parallel relationship between the mount points of the trackbar and the mount points of the drag link.

[03Wrangler]

these are driveline vibes, a transfer case drop is cheapest way to do it...

that or a BL / MML to get your rear drive shaft back to normal angles...

[Ichabod1960]

x2 on the drop pitman arm. You don't need it unless you installed a drop trackbar mount. You also don't want dual steering stabilizers. The power steering pump isn't built to handle the extra stress. BTW, a steering stabilizer just masks DW. Make sure all the bolts are set to the specified torque, set the toe-in correctly, and make sure the wheels are perfectly balanced.

As far as the driveline vibs, you need to get an angle finder (lowes, Home depot) and figure out the angles on the axle pinions, the driveshafts and in the case of the rear the transfer case output. Lots of info to be found by searching on front or rear drivshaft angles.

[Jerry Bransford]

Holy moly, there was lots of stuff done but I'm not sure how much of it was really needed. First, exactly what are you describing as "Death Wobble". Death Wobble is EXTREMELY (!!!!) violent, to the point you believe you are going to lose control of the Jeep. True Death Wobble is so bad your vision will blur and drivers will notice the violent shaking and will move out of your way in fear your Jeep is about to go out of control.

If that wasn't the case, you really only had a shimmy which is, 90% of the time, nothing more than a tire (or two) that is out of balance. Too many people describe a symptom as Death Wobble when it's not even close to that violent problem.

You should not have installed dual steering stabilizers. Even if you had true Death Wobble, a new steering stabilizer is not the fix. Installing a new steering stabilizer to cure Death Wobble is like covering a skin cancer with a band-aid, it's not a cure even if you no longer notice it.

Dual stabilizers are even worse in that you have nearly doubled the amount of work your power steering pump has to do now. On a tough trail on a hot day, dual steering stabilizers could actually cause the power steering fluid to boil over. I would remove the dual stabilizer kit (really) and go to a single stabilizer.

Next I would have the tires carefully balanced as an unbalanced tire is the usual cause of a shimmy. Plus, an unbalanced tire is a common trigger of Death Wobble when it does happen.

Next I would DEFINITELY go back to the OE Pitman arm and use the dropped Pitman arm as a paperweight. With your Jeep's configuration, a dropped Pitman arm will just cause bump steeer.

Finally, I would insure the trackbar's passenger-side mount is TIGHT. For your 2003, it should be tightened to 45 ft-lbs. The combination of a tire out of balance plus a trackbar that is not tight enough is the most common cause of Death Wobble, if indeed you did have true Death Wobble which I am not sure you really had.