Whenever I attempt to use a ground vehicle the game will freeze up and lag when it is moving. I've tried this both with and without mods in use, I've reinstalled the game and my drivers, and ran hard drive surface scans that came out clean.
This seems to happen in every ground vehicle I've used thus far. It should be noted that in some vehicles (Civilian Truck, or NATO HEMTT for example) it doesn't freeze as often in first person, but on switching to third person the freezing and stuttering returns.
There also seems to be some rpt log spam that takes place during this period when the mods are on, although that could be unrelated. I linked two logs below anyway.