Installing Front Drive Shaft

→ Wear personal protective gear.

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

1. Grease the splines with a little Optimoly TA aluminum paste and fit the drive shaft into the new wheel bearing housing. When doing this, press the inner joint together fully.
2. Screw on the axle nut to prevent the shaft from slipping out.
3. Tighten drive shaft.
   1. 3.1. Tighten the drive shaft to setting 1 "before installation" to Tightening torque 130 Nm (96 ftlb.)  . To do this, place the wheel carrier with the drive shaft and countering tool (shop-made) on the floor (do not damage the brake cover plate) and tighten the drive shaft. 2. second mechanic is required! → Tightening drive shaft 
   2. 3.2. The second tightening setting is applied when the wheel bearing housing is installed! Tightening torque 460 Nm (340 ftlb.) 
      Fig 1: Tightening Drive Shaft

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. Fit wheel bearing housing with drive shaft onto the lower trailing arm (second mechanic required!).

   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 2: 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 3: 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. 
5. Installation is performed in reverse order.

   Lower trailing arm to wheel bearing housing: Tightening torque 130 Nm (96 ftlb.) 

   Upper trailing arm to wheel bearing housing: Tightening torque 85 Nm (63 ftlb.) 

   Tie rod to wheel bearing housing: Tightening torque 85 Nm (63 ftlb.) 

   Spring strut to lower trailing arm: Tightening torque 90 Nm (67 ftlb.) +120° 

   Drive shaft to differential: Tightening torque 22 Nm (16 ftlb.) +90° 

   Air guide to lower trailing arm: Tightening torque 10 Nm (7.5 ftlb.) 

   Brake disc to wheel hub: Tightening torque 10 Nm (7.5 ftlb.) 

   Brake calliper to wheel bearing housing: Tightening torque 140 Nm (104 ftlb.) 

   Cable holder to wheel bearing housing: Tightening torque 10 Nm (7.5 ftlb.)