Installing Lower Trailing Arm

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Information

All screws and threaded joints on the axle must be tightened in vehicle position. Vehicle position means: vehicle standing on its wheels, or the wheel suspension is raised with a universal vehicle lift. Dimension -1- , from lower edge of wing to center of axle corresponds to vehicle position. The current height can be found in → 4495TW ADJUSTMENT VALUES FOR SUSPENSION ALIGNMENT . Always observe the following points!

Fig 1: Identifying Dimension 1 - Centre Of Wheel To Lower Edge Of Wing (Front Axle)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
On vehicles with air springs, the respective air spring must be bled using the Porsche System Tester. → 4301IN BLEEDING AND FILLING THE LEVELLING SYSTEM
Vehicle position can be set by carefully raising the relevant wheel bearing housing.
Use an intermediate layer (hard rubber)! Do not damage the brake cover plate.

Fig 2: Lifting Wheel Carrier (Example Without Wheel And Brake Disc)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Screws and nuts are Geomet-coated and must not be greased.
Grease the splines of the drive shaft slightly with aluminum paste Optimoly TA.
Drive shafts must not be left hanging from the joint stop! Tie them up.

WARNING: Wheel bearing housing raised incorrectly

Risk of squashing
Risk of damage to components

→ Wear personal protective gear.

→ Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels).

Installation is carried out in reverse order.
Trailing arm to front subframe:

Trailing arm to rear subframe:

Trailing arm to wheel carrier:

Spring strut to trailing arm:

Air guide to trailing arm: