The 2018 Jeep Wrangler JL has been captured on video many times testing on regular pavement but this being a Wrangler we know it will spend a good deal of its life offroad on all kinds of rough terrain.
Rest assured, Jeep is aware and not taking offroad testing lightly, as seen in these latest videos taken at Silver Lake Sand Dunes near Lake Michigan. The 4-door JL Unlimited is seen driving through bumps and puddles with relative speed and a good deal of suspension travel.
See here for the latest videos of the 2018 Jeep Wrangler sand dunes testing.