As I was working on the interior for a friends tank, I tried everything to make the steering wheel work, I've made steering work for boats and cars, I'm 100% sure it's set up correctly.
The only conclusion is that TankX or even Tank does not support steering wheel animations (Including IK hand movement).
For increased immersion for people working on tank interiors, I think it would be hugely beneficial to include steering wheel functionality, or hell, a lot of tanks don't even have steering, a lot of them have 2 sticks, it would look amazing.