https://youtu.be/3VCWf8fsJ0o
To people having steering issues, this is the best I've found after trying quite a few. This guy also makes excellent Forza car builds. I've tested this setup with GT3 and Formula A cars so far, and both have worked well. Hope this helps some!
Steering Deadzone: 10
Steering Sensitivity: 10
Throttle Deadzone: 10
Throttle Sensitivity: 20
Brake Deadzone: 0
Brake Sensitivity: 20
Clutch Deadzone: 10
Clutch Sensitivity: 45
Speed Sensitivity: 50
Controller Filtering Sensitivity: 45
Force Feedback: 100
RPM/Gear Display: Yes
Controller Input Mode: 3
Advanced: On
Soft Steering Dampening: On
Visual Wheel Filtering: On
Opposite Lock Help: Off
GT: Chizzatron
PSN: Chizzamatic