Yes that's how it started for me too at expansion joints on bridges and overpasses. Over the past month it's gotten worse and oscillates throughout the whole front end of the vehicle until I slow down.
That's what happens to me over expansion bridges, highway water drains, and bumps or dips in the road. I don't think I could maintain that highway speed, the shaking is too extreme. The only way I've been able to control it, is to slowly reduce the speed below 50 mph, and wait for the shaking to stop. I'm waiting for the dealer to call for the "steering damper" they said would fix the issue. Unfortunately, they are back ordered.
I'm scheduled to take it in in Friday, so we shall see! Not a fun thing to experience for sure!
Yes mine seems much more severe than that. I'll let you know what the dealership says tomorrow about it.
Has everyone else checked for lose bolts, etc.? Otherwise you are chasing a ghost by replacing parts and it was something loose. Almost every bolt and nut in my JL's front end was loose and some were even finger tight.
Mine is a bone stock 18 Sahara. I have about 7200 miles
Let us know how your appointment goes on Friday. It will be interesting to see if your case something loose like in Lyleb80's case, or if it is the steering damper per Redrockjk's post. https://www.jlwranglerforums.com/forum/threads/steering-wheel-wobble.16577/page-4#post-417788
Did they try the steering stabilizer / damper?
