Tank chassis car not moving

Ok so I was making my own tank chassis car when I was testing it I found out that the car wouldn’t move I think the reason is the welds I have to keep the parts from falling apart but if I remove the welds the whole car falls apart

dont add welds to the wheels
oh plus add hinges to the wheels

the wheels don’t have welds and I’m pretty sure your not supposed to add hinges to the wheels for tank chassis cars

did you program the seat because if not this is the reason why the tank isnt moving

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