I've the same problem with my G25 wheel. on certain corners i get a complete lock up, always that particular corner and with all cars. Trucks are unplayable, constant lock ups, even on straights with no braking applied.Umm, problem I have is I leave it, it locks the wheels like a digital input. I do the calibration and I might as well get out and turn the car by hand, it'll turn faster. The visualization of the wheel is horribly out of sync with what little input it gives too. I've trawled looking for answers, but the only moans are about FFB.