Installing Rear Wheel Bearing Housing

Information 

The pictures shown in this document may differ from the original.

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Dimension 1 - centre of wheel to lower edge of wing (rear axle shown)

Information 

• All screws and threaded joints on the axle must be tightened in vehicle position. Vehicle position means: vehicle standing on its wheels of the wheel suspension is raised with a universal vehicle lift. Measurement -1  from the lower edge of the wing to the middle of the vehicle axle corresponds to vehicle position. The current height values can be found in

  > 4495TW ADJUSTMENT VALUES FOR SUSPENSION ALIGNMENT

  Always observe the following points! 

• On vehicles with air springs, the respective air spring must be bled using the Porsche System Tester. 

  > WM, 4301IN BLEEDING AND FILLING THE LEVELLING SYSTEM

• Screws and nuts are Geomet-coated and must not be greased. 

Information 

Before installing the shaft, replace the lock ring (circlip) on the shaft as well as the shaft sealing ring n the final drive

> 392255 REMOVING AND INSTALLING SEALING RING FOR HALFSHAFT FLANGE (WITHOUT DIFFERENTIAL LOCK)

Make sure not to damage the sealing ring when guiding the shaft into the final drive.

• The inner end of the drive shall must be held with both hands at the joint and inserted into the rear axle differential with a quick jerk. The outer joint must be held by a second mechanic in order to prevent damage.
• Check that the joint is seated correctly in the rear axle differential: Hold the joint with both hands and pull outwards.
• Visually check that the plastic protective rings are flush on the rear axle differential.

1. Grease the splines with a little Optimoly TA aluminium paste and fit the drive shaft -1-  into the wheel bearing housing -2-A-  . When doing this, press the inner joint together fully.

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   Inserting drive shaft into wheel bearing housing

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   Fitting tool T10206 (shown as an example)

   Information 

   • Pull in the drive shaft as far as it will go using the > T10206 - fitting tool  .
2. Pull the drive shaft into the wheel bearing housing.
3. Grease contact-face ring of axle nut with a little Optimoly TA aluminium paste. Fit new axle nut.
4. After you have pulled the drive shaft into the wheel bearing housing, it still needs to be pre-tightened to the specified tightening torque.

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   Pull in drive shaft

   1. 4.1  In the 1st step, "before installation" tighten drive shaft to > Tightening torque 130 Nm (95.9 ftlb.)  --.

      Place the wheel bearing housing with the drive shaft and tool on the floor (do not damage brake cover plate) and pull in the drive shaft. A helper is required! -Arrow-  .

   2. 4.2  The 2nd tightening step is performed when the wheel bearing housing is installed in the "Subsequent work" section.
5. Left side: Replace the protective plastic ring that was irreparably damaged during removal.
6. Use a new sealing ring in the rear axle-differential and a new protective ring and circlip on the drive shaft.
7. Fit the wheel bearing housing (2nd mechanic required). First, fit the drive shaft on the rear-axle differential housing with a quick, strong blow.

   To make installation easier, raise the wheel mount slightly with a universal vehicle lift! Use a rubber pad to prevent the wheel carrier from slipping! > Lifting wheel bearing housing (example) 

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   Lifting wheel bearing housing (example)

8. Fit new bolts -1, 2-  on the inside of the two upper, wishbones.

   Front upper trailing arm on rear-axle carrier: > Initial tightening 90 Nm (66.4 ftlb.)  -- > Final tightening + 90  °

   Rear upper trailing arm on rear-axle carrier: > Initial tightening 90 Nm (66.4 ftlb.)  -- > Final tightening + 90  °

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   Inner control arm bolts

9. Fit lower control arm -2-  on the wheel bearing housing with new bolt -1-  .

   > 421119 REMOVE AND INSTALL LOWER TRAILING ARM  - "Installing" section

   > Initial tightening 150 Nm (110.6 ftlb.) -- > Final tightening + 90  ° --

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   Lower trailing arm bolts

10. Fit the steering tie rod (toe control arm) on the wheel bearing housing with new bolt.

    > WM, 420919 REMOVING AND INSTALLING REAR TIE ROD (TOE CONTROL ARM)  - "Installing" section

    > Initial tightening 150 Nm (110.6 ftlb.) --. > Final tightening + 90  ° --

11. Fit spring strut with a new bolt on the wheel bearing housing.

    > 427119 REMOVE AND INSTALL REAR SPRING STRUT (STEEL SPRINGS) - "Installing" section

    > Initial tightening 90 Nm (66.4 ftlb.) -- > Final tightening + 90  ° --

12. Fit the brake disc if necessary.

    > 465319 REMOVING AND INSTALLING THE BRAKE DISC REAR - section on "Installing"

    1. 12.1  Fit the brake calliper.

       > 474119 REMOVE AND INSTALL THE BRAKE CALLIPER REAR - section on "Installing"

13. Plug in the central connector -1-  for the ABS wire harness -A-  and lock it -a-. 

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    Central ABS wire harness wheel bearing housing connector

14. Clip the mounting -2-  for the ABS wire harness into the position designed for it -3-  on the body -B-  .