A month ago, when I last played GP4, the wheel worked fine, but now for some reason it doesn't.
The problem I have are the axes. Before, the steering was the X axis, throttle was Y, and brake was IRZ. Steering went from 0 to 16384, and both throttle and brake went between 0 and 255.
Now however, the steering only goes till 1024 and the brake axes moved to the Y axes, now combined with the throttle, which stayed y, and they together moved between 34-234.
The only thing I did different is that I had my PlayStation 4 controller plugged in (which I tried unplugging later), but it shouldn't be noticed by the game because it has no drivers should it..?
I've tried putting my wheel back into the PC, restarting the game, restarting the PC. Nothing seems to solve the problem. All I need is the brake to be back on the IRZ axes because this is undriveable. Either I can't stop or I can't accelerate.
I use a Logitech Driving Force GT wheel, and windows 10 pro (upgraded from windows 7 pro, not with clean install or format but keeping all the files)
GPGSL - Yakuza driver
GPGSL activity check app:
Direct link -
Source code -
Have you posted?