Also, the jeep is drivable and the rear doesn't shake at 75mph anymore.
Now I notice the front is shaking and my driver's seat squeaks!
It never ends
I’ve seen folks have this issue after a regear where the front or rear DS could be removed, but the rig resonates if both are installed and they don’t have a hub kit. Not claiming it’s your issue just throwing it out there in case it helps.
My seat squeaks too need to do the proper mod after the Amazon bushings made noise within a few days.