Realistic 4×4 Traction System V2.0

Realistic 4×4 Traction System V2.0

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

V2.0.0.0
All drivable vehicles now supported (except trains, boats and motorbikes). Each vehicle is recognised by its shop category and its real driveline:
tractors: selectable 4×4 (as before); articulated / 4-track tractors, wheel loaders and telehandlers: permanent 4×4, locks only; 6×4 trucks: lockable inter-axle differential + locks; AWD trucks: selectable front drive; 4×2 trucks: rear lock; cars / pick-ups / UTVs: part-time 4×4 that engages on the move; combines and self-propelled: rear-axle drive on demand.
Limits per vehicle type: when 4×4 and locks can engage, top speed with 4×4, automatic lock / unlock.
New 4×4 window (Left Alt + J): top view of the driveline, 4×4, centre / inter-axle and front / rear locks with the mouse, mode per vehicle (saved with the savegame), tyre pressure (field / road / automatic / manual), telemetry and all settings.
The menu in the game’s settings was removed (it slowed down loading); everything is in the window now.
Mod and DLC tractors without a profile get their mode from the transmission (CVT / full powershift = automatic, partial powershift = semi-automatic, manual gearbox = manual).
Brand profiles now apply to tractors only (Massey Ferguson combines and the Kubota R640 were set to automatic). Challenger MT600 excluded.
Zasty HUD: with the HUD active, the 4×4 panel hides and the HUD shows 6X4 / AWD / 4X2 and the locks.
Multiplayer: driveline and mode of each vehicle reach all players; the chosen mode is checked on the server.
Keys: only Ctrl + J (4×4) and Ctrl + K (locks) remain; single locks, CTIS, tyre pressure, panel and telemetry moved to the window.
Fix: the default keys were not assigned on a new installation.

KEYS (default)
Left Ctrl + J: 4×4 on / off
Left Ctrl + K: Differential locks on / off
Left Alt + J: 4×4 window (locks, tyre pressure, mode, settings)
These are the default keys. If one of them is already used by the game or by another mod, go to Options > Controls and set the key you prefer, to avoid conflicts.