Car Rig Issues

Hello! I’ve been using Blender for about 2-3 years (mostly on the animation side of things), and had watched a tutorial video on making a car rig. The rig works…but only on one axis.

The root bone which controls the wheels only makes them turn on one axis - Global Y. In theory, the way this is set up should work with local Y as well, but it doesn’t. Is there a way to fix this current rig up so it can?

Thank you!

Link to .blend