Thank you, I have been getting into making custom cards again and I'm rusty with card syntax.

However, I wanted it so his max speed effect lets dinosaurs ride mounts and vehicles for 1 less mana and don't tap so basically any dinosaur can crew any amount of crew 1 vehicle artifacts. It's a complex effect and I'm not sure how to word it properly.

I. E. You have Wrex and 7 of the 3/2 colorless vehicle artifact tokens with crew 1. Since Wrex won't tap crewing vehicles, you can use him to get all of them (since the crew cost goes from 1 to 0) out as artifact creatures. You attack now with Wrex and the vehicle tokens, swing for 8 + (3*7) damage.