This is a known issue with Jeep Gladiators and Wranglers. Its called the Death Wobble. While driving at highway speed(70mph), I hit a bump which caused the entire vehicle to shake including the steering wheel. Once I braked and got the speed below 60 mph, the shaking ceased. This happened close to ten times on the particular 3 hour drive. I knew this was a possibility to happen since my son also has a Gladiator and it happened to his vehicle. Its so prevalent there are YouTube videos out there showing it happening. This should be a recall.