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Home >> Subaru >> 2024 >> WRX Base >> Repair and Diagnosis >> Suspension >> Rear Suspension System >> Upper Arm >> Installation

Upper Arm: Installation

CAUTION:
  • For parts which are not reusable, always use new parts.
  • Always tighten the bushing in the state where the vehicle is at curb weight and the wheels are in full contact with the ground.
  • Check if the collar is protruding from the rear axle housing. (CVT model)
  • Do not apply grease, etc. to the ball stud shaft portion.
  • Be careful not to damage the boot of the ball joint.
  1. Before installation, inspect the following items and replace any faulty part with a new one.
    • Check the arm assembly rear upper for damage and deformation.
    • Check the bushing for abnormal cracks, damage or fatigue.
    • Check the boot on the ball joint for abnormal cracks, damage or fatigue.
  2. Install the arm assembly rear upper.
    1. Make the installation sections of the rear lateral link assembly rear (the bolt on the rear axle housing side and the bolt on the sub frame assembly rear side) horizontal.
    2. Install the arm assembly rear upper to the sub frame assembly rear.

      Tightening torque: 

      Nut side: 90 N.m (9.2 kgf-m, 66.4 ft-lb)

      G14601816Courtesy of SUBARU OF AMERICA, INC.
  3. Connect the arm assembly rear upper and the rear axle housing.
    CAUTION: The flange bolt length differs between MT model and CVT model. Confirm the part number before installation.

    Tightening torque: 

    Nut side: 80 N.m (8.2 kgf-m, 59.0 ft-lb)

  4. Install the rear suspension assembly. Ref. to REAR SUSPENSION>SUB FRAME>INSTALLATION .
  5. Release the shift lock and shift the select lever to the "P range". (CVT model) Ref. to CONTROL SYSTEMS>SELECT LEVER>INSTALLATION .
  6. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
  7. Exit the brake maintenance mode. (CVT model) Ref. to PARKING BRAKE>PARKING BRAKE SYSTEM>OPERATION>BRAKE MAINTENANCE MODE .
  8. After the operation is completed, apply and release the parking brake five times and ensure that the brake operates normally.
  9. Inspect the wheel alignment and adjust if necessary.
  10. Perform "VDC sensor midpoint setting mode". Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U)>ADJUSTMENT>VDC SENSOR MIDPOINT SETTING MODE .
  11. Perform the lane keep assist learning value clear. Ref. to EYESIGHT (DIAGNOSTICS)>WORK SUPPORT .