Spinning the wheels

To get the wheels spinning properly I had to make sure the pivot point is in the right position at the center of the wheel so that It will spin on the correct axis.

After this I then made a orient constraint against the X axis in order to make the wheel properly rotate. I then did this for the other wheels to get the rest of the wheels spinning properly as well as this I limited the information so that the control would only rotate or translate the correct way. I made the control into the right shape by first creating an arrow shape from the curve tool and then putting a non-linear bend deformer onto the arrow and changing the curvature to properly bend the arrow, then I deleted the history of the control to get rid of the line however keeping the curvature in the arrow.