Have had a 2003 Rubicon for 4 years. It had a infrequent shimmy at 45 mph prior to gear change and steering stabilizer ( shop that did gears threw on the stabilizer when I mentioned the shimmy after looking other possible culprits and determining nothing stood out and I was running an oem stabilizer. The shimmy has now moved to around 55 mph. I can look at the driver side front tire while driving and see it shake back and forth. It does not do it all of the time driving at 55 mph. It predominantly seems to occur when entering or exiting a gradual curve at 55 mph but sometimes on a straight. I can drive at 80 mph on the highway and it is perfect as it is in every other situation and steering feels tight and can track straight. Jeep has a 4" lift with 285/75/16 General Grabbers (E load) on factory wheels that were on the Jeep when I bought it. Front wheel has skinny spacers to avoid tires hitting the sway bar links.
Most recent work since the 45 mph shimmy started:
-Savvy control arms all around with Johnny joints all around
-alignment after I installed the control arms
-ORO swayloc
-4.56 gears and steering stabilizer was the most recent and was at the time. Everything was fine during the gear break in and 45 mph shimmy dissappeared, but as soon as I was cleared to go above 40 mph I noticed the shimmy moved to 55 mph and was severe and I did not even want to drive it on the highway.
-rear drive shaft (Tom Woods) rebuild done at gear change. Was rebuilt and balanced by a reputable shop
-This week I noticed someone set air pressure to 30 psi. I reduced it to 26 psi. It reduced the shimmy severity and frequency on straight road. It is a tight shimmy right now and fully controllable
-rotated wheels front to back. Did not change anything
-rotated fronts side to side. Did not change anything
-Removed wheel spacers. Did not change anything
-The shop that did the gears said if the stabilizer did not fix the shimmy they wanted to install new tie rod and drag link but said everything is tight and they would not throw money at it . There was very slight ball joint play when doing the gears but they said they would leave them alone for the amount of play exhibited. I would just install the Rockjock Correctlync upgrade myself if that is the likely issue. I am just perplexed that it occurs at a specific speed and that speed has changed.
Most recent work since the 45 mph shimmy started:
-Savvy control arms all around with Johnny joints all around
-alignment after I installed the control arms
-ORO swayloc
-4.56 gears and steering stabilizer was the most recent and was at the time. Everything was fine during the gear break in and 45 mph shimmy dissappeared, but as soon as I was cleared to go above 40 mph I noticed the shimmy moved to 55 mph and was severe and I did not even want to drive it on the highway.
-rear drive shaft (Tom Woods) rebuild done at gear change. Was rebuilt and balanced by a reputable shop
-This week I noticed someone set air pressure to 30 psi. I reduced it to 26 psi. It reduced the shimmy severity and frequency on straight road. It is a tight shimmy right now and fully controllable
-rotated wheels front to back. Did not change anything
-rotated fronts side to side. Did not change anything
-Removed wheel spacers. Did not change anything
-The shop that did the gears said if the stabilizer did not fix the shimmy they wanted to install new tie rod and drag link but said everything is tight and they would not throw money at it . There was very slight ball joint play when doing the gears but they said they would leave them alone for the amount of play exhibited. I would just install the Rockjock Correctlync upgrade myself if that is the likely issue. I am just perplexed that it occurs at a specific speed and that speed has changed.
