I can not log in that sitehttp://www.assettocorsa.net/forum/index.php?threads/bone-animation-rig-blender.34594/ first off if you use Blender this should be able to make serviceable driver animations.
driver_base_pos.knh sets his location at rest, and then steer.ksanim animates steering and shift_up/shift_dn.ksanim are for gear changes.