Realistic 4×4 Traction System V1.7.0.1

Realistic 4×4 Traction System V1.7.0.1

Multiplayer in development, playable but may contain bugs
Take real control of your tractor’s traction — engage 4×4, lock the differential and let the system react to actual wheel slip, not just to an assigned key.

This mod adds a fully switchable 4×4 traction system to compatible vehicles (tractors, trucks, harvesters, cars): engage/disengage the front axle when needed and toggle a differential lock that trades turning radius for maximum grip in mud, snow or during heavy work.

Features
Real rear-wheel slip detection — automatic modes react to actual wheel-slip physics, not just speed
Four driving modes, assigned to each vehicle by default:
Manual — always in control
Semi-automatic — engages with actual wheel slip, while manual control is always available
Automatic — the same logic, adjusted for vehicles with factory-fitted automatic 4WD (CVT/IVT transmissions)
Intelligent — continuous, proportional engagement in the Fendt style (without abrupt switching on/off)
Native tyre-pressure simulation during engagement — no dependency on any other mod
On-screen HUD with real-time status and adjustable position in the game Settings menu
Zero XML changes to any vehicle — the system integrates automatically into all compatible vehicles

V1.7.0.1
Fixes
AI helper: the combine could stand still reversing uphill and would not shift gear (reported by Patrik Vendelberger). The 4×4 now only works on the vehicle driven by a player; with an AI helper, stopped with nobody inside or parked, the vehicle uses the game’s original differentials, tyre radius and speed limit.
Missing translation for “Move 4WD HUD” (log warning) in 22 languages (reported by Patrik Vendelberger).
HUD textures compressed no more “raw format” warnings in the log.
Faster game start: the settings menu section is now built only the first time you open Settings (it froze the start by ~4 s).
New: Vehicle Control Addon (VCA) compatibility (suggested by Cris669)
VCA has its own 4WD and diff locks and rewrites the differentials every frame, so both mods were fighting. New option in Settings > General > 4×4 Traction System > “With Vehicle Control Addon”:
Command VCA (default): our automatic 4WD logic (slip, implement lowered, braking, tight turns, GPS prediction) switches VCA’s 4WD and diff locks; VCA handles the differentials. CTIS, tyre pressure, HUD and telemetry keep working.
Leave to VCA: only VCA works on that vehicle.
Ignore VCA: old behaviour (not recommended).
NOTE: the VCA integration should work, but it has not been tested in-game yet with VCA installed. Please test it and send feedback/log if something is not right.
Checked with Headland Management and CVT Addon (suggested by Cris669): no conflicts found.

Thanks to Patrik Vendelberger and Cris669 for the reports!