Rear Suspension - Overview: Function
WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.
If compression takes place on both wheels evenly (for example when a load is placed on the vehicle), the whole axle unit swivels evenly in the rubber-metal bearings. If only one wheel is compressed, the cross-beam twists (undergoes torsion) and acts as a stabilizer. This minimizes track and toe changes.