I suggest using this tutorial:How to build a basic car
Is the hinge inside the base of the car?
I’m guessing you figured out that you haven’t been selecting the HingeConstraint Attachments and moving them according to the video so they align with the Attachments for the wheel axle Parts.
I just dont understand that stuff
The Attachments of the HingeConstraint have to be located at the same Position in the model, otherwise they try to move to align when you run the game.
You can select the Attachment with the Drag tool and pull it to where you want the Hinge to be located, even in to the center of the tire if you want the most realistic operation.
If you download a copy of the place I can have a look at it to see what’s up.
I think this is a bug, make sure hinges are connected, NO parts are anchored, you scripted everything correctly, if none of that helps, then its likely a glitch.
Also, can you make the title more descriptive, so its not misleading.