PC - Clutch pedal T3PA

Hi,
I’m playing Forza Motorsport 7 on pc and I’m using Thrustmaster TX, T3PA pedal set and TH8A gear.
Everything works fine, except I cannot find any proper setting for the clutch.
Even if I tried to change the maximum and minimum value, every time the clutch is released (100% in-game telemetry), ita takes nearly a second to take effect.
The result is a slower gear change when upshifting and frequent rear wheels lock when downshifting, even if I do heel toe.

Do you have any advice?
Thanks a lot