no, typically everything gets baked to keyframes when exporting as FBX file. The engine doesnt have to deal with IK or anything. On export there is one key placed for every frame with all bone tranformations as fixed values.
The current precision is not 100% perfect but very very high. Nothing to even slightly worry about and with the wheel using the helper position it is completely unnoticeable. Even when you zoom in all the way. To answer your question, the FBX export format does not nearly support all this nifty stuff my brother used in 3ds…