Rear Axle

42 Rear Axle







The existing multi-link rear axle from the previous 911 Carrera (996) model has been enhanced for the 911 Carrera/S (997). The multi-link concept makes a vital contribution to exemplary driving stability, particularly when accelerating and braking as well as changing lanes sharply and changing the load in corners.

Similar to the front axle, the track at the rear axle has been widened by 30 mm to improve the handling of the vehicle and the rigidity of individual axle components has been increased. This, together with the new tire generation, has enabled higher lateral accelerations overall to be achieved. It has also increased tire comfort at the rear axle. A reworked kinematic mechanism (with displacement of the axle attachment points) has significantly reduced vehicle deflection when accelerating and therefore further improved driving behavior.

The main objective of redesigning the rear axle components was to increase transverse rigidity while at the same time reducing weight through the consistent use of light-weight construction techniques.

The optimization comprises the following components:







4206 Rear Axle Bracket (A)

The design has been completely revised based on increased driving dynamics. At the same time, the cross member has been widened by 15 mm on each side. This has allowed the axle attachment points to be moved out by 30 mm to widen the track.

In order to reduce weight, the casting procedure for the front-axle cross member was switched from die-casting to pressure casting.

4206 Rear Axle Side Section (B)

The side section, which remains based on an aluminium frame structure, has been newly developed and made more rigid, particularly in the transverse direction. The redesign has also resulted in a weight reduction.

The attachment points of the upper control arm have also been moved up a further 10 mm and the attachment points of the lower control arm moved down a further 5 mm (enlarged camber basis). This provides increased rigidity against transverse forces, which are introduced into the vehicle via the wheels. The attachment to the body now consists of a stud and two collared nuts.