FS25 Realistic 4×4 Traction System V2.1.0.0

FS25 Realistic 4×4 Traction System V2.1.0.0

Control your tractor’s traction with a switchable 4×4 system that responds to real wheel slip. Multiplayer is still being developed and can be played, but bugs may occur.

Features

• Actual rear-wheel slip detection, with automatic modes based on real wheel-slip physics rather than speed alone
• Every vehicle is assigned one of four driving modes by default:
  • Manual, with permanent player control
  • Semi-automatic, which engages when actual wheel slip occurs while manual control remains available at all times
  • Automatic, using the same logic adapted for vehicles equipped with factory automatic 4WD, including CVT/IVT transmissions
  • Intelligent, providing continuous proportional engagement in the Fendt style instead of sudden switching on or off
• Native tyre-pressure simulation while 4WD is engaged, without requiring another mod
• Real-time status shown in an on-screen HUD, whose position can be adjusted through the game Settings menu
• No XML edits are needed for vehicles, with automatic integration for every compatible vehicle

Changelog

• V2.1.0.0
  • SIMPLE mode is new and set as default: tractors, wheel loaders and telehandlers only, with automatic 4WD on every tractor. It engages through wheel slip or when an implement is lowered, and has no speed limit while 4WD is engaged. Install and play.
  • REALISTIC mode retains all 2.0 functions: factory modes, real speed limits, every vehicle and manually controlled tyre pressure. Select it in the window: Left Alt + J > Settings > System mode. Reload the game after making the change.
  • Switch to Realistic to return to the old behaviour.
• V2.0.0.1
  • Fix: a repeating Lua error in the log, FourWDTractionSystem.lua:2518: invalid argument #3 to 'format', affecting vehicles with permanent 4×4 or no 4×4 speed limit, including 6×4 trucks, wheel loaders and articulated tractors. Thanks to Patrik Vendelberger for reporting it.
• V2.0.0.0
  • Support now covers all drivable vehicles except trains, boats and motorbikes.
  • The system identifies each vehicle through its shop category and actual driveline:
    • Tractors: selectable 4×4, as before
    • Articulated and 4-track tractors, wheel loaders and telehandlers: permanent 4×4, with locks only
    • 6×4 trucks: lockable inter-axle differential and locks
    • AWD trucks: selectable front drive
    • 4×2 trucks: rear lock
    • Cars, pick-ups and UTVs: part-time 4×4 that engages while moving
    • Combines and self-propelled vehicles: rear-axle drive when required
  • Vehicle-type limits control when 4×4 and locks may engage, the maximum speed with 4×4, and automatic locking or unlocking.
  • The new 4×4 window opens with Left Alt + J. It provides a top view of the driveline, 4×4, centre and inter-axle locks, mouse-operated front and rear locks, a saved vehicle mode with the savegame, tyre pressure choices for field, road, automatic and manual use, telemetry and all settings.
  • The menu in the game’s settings was removed because it made loading slower. The window now contains everything.
  • For mod and DLC tractors without a profile, the transmission determines the mode: CVT and full powershift are automatic, partial powershift is semi-automatic, and a manual gearbox is manual.
  • Brand profiles now affect tractors only. Massey Ferguson combines and the Kubota R640 were changed to automatic. Challenger MT600 is excluded.
  • Zasty HUD: when the HUD is active, the 4×4 panel is hidden and the HUD displays 6X4, AWD or 4X2 together with the locks.
  • Multiplayer sends each vehicle’s driveline and mode to all players, while the selected mode is checked on the server.
  • Only Ctrl + J for 4×4 and Ctrl + K for locks remain as keys. Single locks, CTIS, tyre pressure, the panel and telemetry are now in the window.
  • Fix: default keys were missing on a new installation.
  • Default keys:
    • Left Ctrl + J: switch 4×4 on or off
    • Left Ctrl + K: switch differential locks on or off
    • Left Alt + J: open the 4×4 window, including locks, tyre pressure, mode and settings
  • These are the default keys. When a key is already assigned to the game or another mod, open Options > Controls and choose your preferred key to prevent conflicts.