The system is incredibly fast; it takes less than half a second to engage the dog clutch. This secures maximum traction and mobility at all times.

Jonas Odermalm

Construction segment manager Volvo Trucks

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ATC engages automatically

How it works

When it’s slippery, Automatic Traction Control engages and disengages the front wheel drive automatically at the exact time you need it. Sensors on the rear wheels detect when you’re starting to lose traction, and all-wheel drive is instantly engaged. A dog clutch then transfers the power to the driven front axle, and the truck continues without dropping either torque or speed. The driven front axle remains activated until the driver releases the accelerator pedal.

ATC requires no driver interaction – it just works. There is, however, a dashboard switch that lets you manually engage the front axle, or when the driving conditions get extremely rough, engage all the diff locks.

This well-proven system has been a feature on Volvo Construction Equipment for years. We’re the first manufacturer to introduce this revolutionary system to a construction truck.

ATC is only in use when needed, in order to save fuel and wear

Save precious fuel

Our research shows that most only need all-wheel drive 5% of the time. This means that 95% of the time a driven front axle is a waste of fuel. Automatic Traction Control helps you maximise fuel efficiency. When you don’t need the extra traction, the system automatically disengages the front axle, reducing your fuel consumption by up to 2% (based on a regional haul driving cycle). Automatically disengaging the front axle also reduces wear and tear.

ATC supplies all traction, when needed

No compromises

A driven front axle gets you out of trouble. But when it’s engaged, it impairs manoeuvrability. Unlike permanent all-wheel drive systems, ATC gives you the best of both worlds. When the driven front axle is engaged, you get all the traction you need. And when it’s disengaged (which it is most of the time), you improve the manoeuvrability of your truck.

The Volvo FMX chassis is designed to protect all vital parts

Everything’s protected

The Volvo FMX chassis has been designed to protect all vital parts. The parallel rods and link rods are placed in line with the axle, inside the axle-casing envelope. The brake chambers and fuel tanks are also well protected.

The driven front axle has the same position as the non-driven axle – giving you a much better approach angle when climbing steep gradients (28° with driven front axle and tyre dimension 13R22.5). The driven front axle is also available with rear air suspension, providing a ground clearance of 300 millimetres.

Learn more about rear air suspension
Available configurations for FMX automatic traction control

Available configurations

  • 4×4 rigid
  • 4×4 tractor
  • 6×6 rigid
  • 6×6 tractor
  • 8×6 rigid

Find your local dealer

You’re in control

Want to test Automatic Traction Control for yourself? Contact your local Volvo Trucks dealer.

Find your local dealer