It was at varying speeds, typically when I hit a bump or around 30-40, 60-65, or deceleration without use of the brake. You may have something lose underneath
Found the culprit of my death wobble in my '04 tj sport! It was the bolt from the control arm to the axle. It was way loose and could have been disastrous had I not have checked! Thanks to TerryMason and his video post