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Home >> Porsche >> 2008 >> Cayenne Base, Automatic >> Repair and Diagnosis >> Transmission >> Transfer Case >> 39 - Final Drive - Differential, Differential Lock >> WM 398819 Removing And Installing Four-Wheel Final Drive (Except Cayenne GTS Tip "PORSCHE Design Edition 3") >> Removing Four-Wheel Final Drive

Removing Four-Wheel Final Drive

Fig 1: Overview Of Front-Axle Final Drive
G09411007Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  1. Clamp steering wheel in centre position with steering wheel holder -figure-  .
    Fig 2: Positioning Steering Wheel Using Holder
    G09411008Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  2. Unscrew plastic nuts -arrows-  on front right wheel housing liner.
    Fig 3: Locating Wheel Housing Liner Mount
    G09411009Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  3. Engage special tool spring compressor VW 552  in top of wheel housing, behind wheel housing liner, and support the spring strut.
    Fig 4: Identifying Installation Position Of Spring Compressor
    G09411010Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  4. Remove cover plate on the steering -arrows-  .
    Fig 5: Locating Steering Cover Plate Bolts
    G09411011Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  5. Pull Servotronic plug off the steering gear.
  6. Unscrew bolted connection -arrow-  securing universal joint to steering gear. Remove universal joint from steering gear.
    Fig 6: Identifying Universal Joint Bolted Connection
    G09411012Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  7. Remove left and right drive shafts from the all-wheel final drive using multiple-tooth socket-wrench insert M12 Nr.31. 
  8. Undo fastening screws for all-wheel final drive and screw on drive flange.
    Fig 7: Locating VAG Bolts
    G09411013Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Information 

    • Supports 1, 4 and 7 must be fitted to the unit lifting platform. 
  9. Raise unit lifting platform until it is touching the front-axle carrier.

    Information 

    • Fastening screw -left arrow- at front right cannot be removed until the front-axle carrier is lowered. 
      Fig 8: Locating VAG Bolts
      G09411014Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  10. Unscrew bolts -arrows-  on front-axle carrier.
    Fig 9: Locating Front-Axle Carrier Bolts
    G09411015Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  11. Undo bolt connecting spring strut to trailing arm -arrow-  .
    Fig 10: Locating Bolt Connecting Spring Strut To Trailing Arm
    G09411016Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  12. Unscrew servo line holders -arrow-  from air-conditioning compressor and remove the line.
    Fig 11: Locating Servo Line Holder
    G09411017Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  13. Disengage servo line from the front-axle carrier at the three holders -arrows-  .
    Fig 12: Locating Servo Line Holders
    G09411018Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  14. Loosen holders for coolant pipes -arrow-  at the body.
    Fig 13: Locating Coolant Pipe Holders
    G09411019Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    NOTE: Chassis sub-frame lowered too far
    • Over-extension of joints on the chassis

    → Only lower the chassis sub-frame sufficiently to allow the transmission to be removed.

  15. Lower the front-axle carrier with the unit lifting platform. Remove the vent line from the final drive at the same time.
    CAUTION: Risk of damage to ATF lines and pressure line for power steering.

    → Protect ATF lines with water hose or similar.

    → The servo line must not be crushed or stretched.

    Information 

    • A second fitter is required for removing/installing the four-wheel final drive. 
  16. Press left drive shaft out of flange on final drive.
    Fig 14: Pressing Out Drive Shaft
    G09411020Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  17. Lift transmission and press to the left.
  18. Tilt forward the transmission housing together with drive flange.
    Fig 15: Tilting Transmission Housing And Drive Flange
    G09411021Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  19. Remove all-wheel final drive downwards through the front-axle carrier.
    Fig 16: Removing All-Wheel Final Drive
    G09411022Courtesy of PORSCHE CARS NORTH AMERICA, INC.