Did you make a function to cycle through and tell the system how many wheels are driven? By default wheels are decoupled from the drivetrain, so you have to enable them. I changed the differential setup to only handle the wheel Id, and the IsDriven boolen, as those are the only things the PhysXNW class takes into consideration, I made a struct and an array to handle these values and set them up in the constructor for my initial tire count, though I’m sure there’s a better way, I could’ve added these to the wheel setup struct, but I like to avoid recompiling the engine as much as possible. If you have any problems, I’ll post the code in here for you, just let me know. Also, I’ve never seen that thread and I’ve googled and search for N Wheeled vehicle answers like a thousand times. That would’ve been so helpful a couple of weeks ago.