ATS - Physics Mod V1.3

Physics mod for American Truck Simulator, created by zeemods.

Suspension & Cabin Movement
Chassis Suspension Overhaul – More realistic weight transfer and rebound behavior.
Cabin Suspension Adjustments – Improved independent cabin movement that reacts naturally to road conditions.
Balanced Cabin Lean & Roll – No more “blocky” side-to-side motion; smoother transitions.
Reduced Over-Dampening – Trucks now feel less stiff and more responsive to bumps and terrain.

Transmission, Gearbox Behavior & Powertrain Realism
Improved Automatic Shifting Logic
Shifts at lower RPMs under light throttle for better fuel efficiency.
Holds gears properly under load for realistic power delivery.
Reduced excessive gear hunting.
Adjusted shift timing for a more natural feel.
Refined Manual Gearbox Behavior
Clutch engagement tuned for smoother starts.
More realistic RPM fall.
Improved Transmission Resistance – More natural power loss through the drivetrain, making acceleration and deceleration feel smoother and more authentic.
Balanced Flywheel Inertia – The engine now holds and loses revs in a more progressive and realistic way, improving shift behavior and coasting.
Refined Torque Converter Behavior – Gear shifts feel smoother and more natural, especially under load, preventing excessive slipping while maintaining realistic power delivery.

Steering & Handling
More Progressive Steering Response – Less sensitive at center for better highway stability.
Balanced Steering Wheel Travel – Adjusted max steering angle to better match real trucks (38 degrees)
Supports Gamepads – Features realistic, speed-sensitive auto-centering for smooth and precise control.

Road & Environment Interaction
Refined Wheel Slip Behavior – Adjusted slip factors to reduce understeer/oversteer.
More Noticeable Mini-Bumps & Road Feedback – Feels more like a real truck suspension.
Subtle Air Seat Movement Simulation – Adds immersion with natural seat bounce over bumps.

Realistic Throttle Curve
Optional realistic throttle curve included, providing smoother and more progressive throttle response. This improves low-speed control, reduces jerky acceleration, and enhances realism by mimicking the way real truck engines respond to throttle input.

Compatibility & Optimization
Works with All Trucks – Fully compatible with stock and modded trucks (providing they have independent chassis/cabin physics)

Designed for Wheel Users – Balanced for users with a steering wheel.
Designed for Gamepad Users – Handle your truck with ease without a steering wheel.

Authors: zeemods