Realistic 4×4 Traction System V2.0.0.0

Multiplayer is in development. The mod adds a switchable 4×4 traction system to compatible tractors, trucks, harvesters and cars, with differential locks and wheel-slip-based reactions.

Multiplayer is playable but may contain bugs.

Features

• Real rear-wheel slip detection, with automatic modes reacting 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, using the same logic adjusted for vehicles with factory-fitted automatic 4WD, including CVT/IVT transmissions.
• Intelligent, with continuous, proportional engagement in the Fendt style, without abrupt switching on or off.
• Native tyre-pressure simulation during engagement, with 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, with the system integrating automatically into all compatible vehicles.

V2.0.0.0

• All drivable vehicles are now supported, except trains, boats and motorbikes.
• Each vehicle is recognised by its shop category and its real driveline: tractors have selectable 4×4, as before; articulated / 4-track tractors, wheel loaders and telehandlers have permanent 4×4, with locks only; 6×4 trucks have a lockable inter-axle differential plus locks; AWD trucks have selectable front drive; 4×2 trucks have a rear lock; cars / pick-ups / UTVs have part-time 4×4 that engages on the move; combines and self-propelled vehicles have rear-axle drive on demand.
• Limits per vehicle type determine when 4×4 and locks can engage, the top speed with 4×4, and automatic lock / unlock.
• New 4×4 window, opened with Left Alt + J, with a top view of the driveline, 4×4, centre / inter-axle and front / rear locks controlled with the mouse, mode per vehicle saved with the savegame, tyre pressure options for field / road / automatic / manual, telemetry and all settings.
• The menu in the game’s settings was removed because it slowed down loading. Everything is now in the window.
• 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 is excluded.
• Zasty HUD: with the HUD active, the 4×4 panel hides and the HUD shows 6X4 / AWD / 4X2 and the locks.
• Multiplayer: the driveline and mode of each vehicle reach all players, and the chosen mode is checked on the server.
• Keys: only Ctrl + J for 4×4 and Ctrl + K for 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, including locks, tyre pressure, mode and 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.

V1.7.0.1

• Fixes for the AI helper: the combine could stand still reversing uphill and would not shift gear, as 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.
• Fixed the missing translation for Move 4WD HUD, which caused a log warning in 22 languages, as reported by Patrik Vendelberger.
• HUD textures compressed, so there are 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 previously 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): the mod’s automatic 4WD logic, including slip, implement lowered, braking, tight turns and 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.
• 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.

V1.7.0.0

• New in-game settings menu: Esc -> Settings -> General -> 4x4 Traction System.
• Settings include HUD position and style, engage 4WD with implement lowered, disengage in tight turns, engage when braking, road speed limit, GPS prediction strength, locked centre torque bias, tyre pressure by hand and diagnostic log.
• Settings are saved in modSettings/FS25_4x4TractionSystem.xml, kept for all savegames and when the mod is updated.
• No more editing files inside the zip.
• New minimalist HUD, optional by choosing Icon in the menu: the tractor seen from the side.
• Green wheel = wheel with traction. The rear is always green; the front wheel and the drive shaft turn green when 4WD engages, and are grey in 2WD.
• Padlocks = diff locks: on the rear hub for rear, on the transfer box for centre and on the front hub for front.
• A wheel that is slipping flashes green/red, with each axle operating on its own. Both wheels flash with low field pressure at road speed.
• Tyre pressure is shown under each wheel, front / rear, in bar, on tractors with CTIS or pressure by hand.
• The shop picture of the tractor being driven is shown next to the icon and can be switched off.
• Text underneath shows 4X4 / 2X4, mode and active locks. Three sizes are available.
• Move the HUD, panel or icon with the mouse: press Ctrl+Shift+N, drag with the left button, then right click / Esc / Enter to finish. The camera stays still while moving. The key can be changed in the Controls menu.
• Note: the new menu and icon texts are in English and Portuguese. Other languages show English for now. Work on translations is in progress.