My shape radius is exactly half the diameter of the wheels. I just don’t get what is wrong with it. I tried following several different tutorials. Some used influence painting. Some just skinned the joints with a rigid bind. I have set and reset the physics for each joint, using every shape. The root joint is at 0,0,0. Z is up. X is forward. I set the wheels to Kinematic. If I leave the root joint set to default, it flies around the screen like a balloon that just had the air let out of it. If I set it to Kinematic, it sits above the ground, and just hovers. (Gravity IS enabled). If I set it to Simulated, the camera flips 90 degrees to the right, and makes everything on screen sideways. The last tutorial I followed was off of digital tutors, and it still didn’t work. I even tried exporting and reimporting the Sedan mesh and got the same result.