Vehicle Rigging tutorials and animation in 3ds max using Reactor, Artist Lizandro Hurtado M has some amazing skills with reactor in 3ds max, Check out the unique and wonderful truck animation rig with a double trailer  and car rigging tutorials and animations, you can check the Youtube Channel for the new rigging tutorials.

You can check the Caterpillar Rigging plus the scripting Tutorial in 3ds max here - https://www.facebook.com/lizandro.hurtado.9/videos/649600848781482/

Youtube Channel: https://www.youtube.com/channel/UCAKczNiMeMBlwfqiDU6AxbA/
Facebook Page: https://www.facebook.com/lizandro.hurtado.9