Hi, I've been having this problem with a violent wheel shaking in straight line. But it is more disturbing while stopped at pit starting a session. For exemple, I chose the Mini and any track. Hit the botton right button to start the practice, car stopped at pits, no braking or acelerating. Wheel goes left to right. I use a Fanatec V2, dumper set to 0 on fanatec settings page. On wheel config with all but FF and For to 0. In game settings to Pure + 3, -100% and 40% low ffb. Wiht only Pure setting (180 or 360 hz) this does not happen, only what I think is normal for the car going fast on a straight line, but nothing when stopped. Am I missing something for not using the Pure +3 FFB setting? I think I saw someone here from reiza telling to use Pure +3 with fanatec wheels. Edit: other sims I have don't have this.
I have a similar problem with my wheel shaking violently left to right on flat long fast straights (Monza, Spa etc...) It happens on new tires as well (i.e....no flat-spots).. I have the T500 My low FFB is set to +40 and overall FFB strength is set to 80 in game and 50% in Thrustmaster Control panel.
The canned effects present in anything other than PURE level may cause such vibration. You could also try reducing low Force Boost to 20 or even 0%.