2019 Subaru Ascent BaseFACTORY OEM SERVICE PROCEDURE

Control Valve Body: Installation

  1. Clean the mating surface of oil pan and transmission case.
  2. Check the control valve body for foreign matter adhesion.
  3. Install new O-rings to the pressure pipe No. 1, pressure pipe No. 2 and pressure pipe No. 3.
    CAUTION:
    • Before installing O-rings, apply sufficient amount of CVTF to avoid damage and deformation.
    • Use SUBARU genuine CVTF.
    • Be careful not to incorrectly install or fail to install O-rings and other such parts.
  4. Install the pressure pipe No. 1, pressure pipe No. 2 and pressure pipe No. 3 to the transmission case.
    G13200056Courtesy of SUBARU OF AMERICA, INC.
  5. Install the control valve body.
    CAUTION:
    • Beware of the transmission harness getting caught in between.
    • Do not impact or bend the transmission harness because it has the oil temperature sensor inside.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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