Bit of an odd one but I recently updated to Windows 8.1 and started getting issues with my G27 and rF2. The degrees of rotation is not set correctly for each car so 180 degrees of physical movement each way relates to full lock in the game. The wheel works fine with rF1 however there is only 180 degrees of rotation set up for that one. I'm fairly certain this is a driver issue as a result of updating to Windows 8.1 but thought I'd ask around anyway!