Originally Posted by bluecrow jeep
just had new struts and shocks installed. don't know if this could be related to that.
at 45-60 mph a shutter occurs and must slow to 30 to stop.
had tires checked and re balanced, no that. any thoughts from anyone?
Look up "death wobble" videos and see if that matches.
Any aftermarket lifts or oversize tires, aftermarket wheels? All can contribute.
Did you have this BEFORE the work was done? If not, have a heart to heart chat with whomever did the work as to whether they aligned it properly, observed any other worn suspension parts, etc. You might even want to get the alignment and front end checked by a second specialist.
If you are seeing death wobble, a steering stabilizer may help cure it--but it is really a band aid for something else wrong in the suspension.