Here is what I use and love-
FFB settings with GYRO enabled:
IMPORTANT: go to :\Program Files (x86)\Steam\steamapps\common\assettocorsa\system\cfg and open the Assetto Corsa INI using Notepad.
Go to the [FF_EXPERIMENTAL] section and set ENABLE_ GYRO=1 and set DAMPER_MIN_LEVEL=0.01 and save. Should look like this:
[FF_EXPERIMENTAL]
ENABLE_GYRO=1
DAMPER_MIN_LEVEL=0.01
DAMPER_GAIN=1.0
IMPORTANT: go to :\Documents\Assetto Corsa\cfg and open the ff_post_process INI using Notepad and make sure that it looks like this:
[HEADER]
VERSION=1
TYPE=LUT
ENABLED=0
[GAMMA]
VALUE=0.5
[LUT]
CURVE=doesn't_matter.lut
----------------------------
In the Thrustmaster control panel:
Overall Strength: 90%
Constant: 100%
Periodic: 100%
Spring: 0%
Damper: 100%
Auto-center: By the game
--------------------
In game:
Gain: 80%
Filter: 0%
Min force: 6%
Kerb: 0%
Road: 0%
Slip: 0%
Understeer: UNCHECKED