The Cross Country employs all-wheel drive. The system is
constant and can not be altered between 2WD and 4WD. The Cross
Country differs from a 'traditional' off-road vehicle in that it
does not have a heavy transfer case and does not offer low-range
drive ratios.
Volvo's simple AWD system adds only 102kg to the kerb mass of
the Cross Country compared to the V70 2.4T. The Cross Country
weighs 1630kg, far less than its rivals such as BMW's X5, Audi
Allroad and traditional 4WDs which weigh two tonnes and more.
The Cross Country all-wheel drive system uses a light,
uncomplicated and reliable viscous coupling to bias drive to the
rear wheels. When cruising on dry roads, the balance of drive front
to rear is 95/5 percent. The viscous coupling - consisting of a
silicon grease and slotted discs - can change drive bias to a 50/50
front to rear balance very rapidly should driving conditions demand
more drive to the rear wheels.
The AWD system is not designed for pure off-road driving; yet it
is remarkably capable.
Compared to the previous Cross Country, the front track has been
increased by 90mm and the rear by 57mm. This helps to produce
excellent roll stability, especially when cornering on uneven road
surfaces.
With a differential and driveshaft at the rear, the AWD Cross
Country has an almost perfect weight distribution front and rear
which results in balanced handling and neutral steering
characteristics on all roads.
The AWD system functions quite simply by simple bevel drive off
the front drive shaft. This saves the need for a heavy centre
differential.
The viscous coupling is mounted to the nose of the rear
differential, as it was in the previous generation Cross Country.
However, the current Cross Country does not employ a limited-spin
control in the rear differential as did the previous Cross
Country.
Spin is controlled at all four wheels by an advanced TRACS
system which uses the braking system to halt wheel spin thereby
forcing 'drive' to the wheel(s) with traction.
Wheel spin is controlled by a four-wheel TRACS traction control
system. A sensor at each wheel registers any difference in wheel
speeds and by braking the spinning wheel(s), drive is pushed to the
other wheel on the same axle.
This advanced TRACS system works at vehicle speeds up to
80km/h.
In addition the Cross Country is equipped with ABS anti-lock
braking and EBD (electronic brake distribution) braking control
developed for the V70.