There is a bug regarding steering lock and the known fix is to set deadzone to 0. My settings I found work well are:

Steering Deadzone 0
Steering Sensitivity 0
Throttle Deadzone 20
Throttle Sensitivity 0
Brake Deadzone 10
Brake Sensitivity 50
Clutch Deadzone 15
Clutch Sensitivity 45
Speed Sensitivity 90
Controller Filtering Sensitivity 5

Controller Input Mode 1
Soft Steering Dampening Off
Visual Wheel Filtering On
Opposite Lock Help On


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I've found htese settings useful when trialing the XB1 pad on PC

Steering Deadzone : 15

Steering Sensitivity : 0

Throttle Deadzone : 0

Throttle Sensitivity : 30

Brake Deadzone : 13

Brake Sensitivity : 15

Clutch Deadzone : 0

Clutch Sensitivity : 45

Speed Sensitivity : 75

Controller Filtering Sensitivity : 50

Force Feedback : 80

Controller Input Mode : 3

Advanced : OFF 
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10 30 0 10 0 20 0 10 /70 35/ 3 oui oui oui non
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30/30/5/30/5/25/10/45/65/20/0/0/ aide verrouillage non

