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Home >> Kia >> 2017 >> Optima Plug-In Hybrid EX >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Hydraulic System (PHEV) >> Automatic Transaxle Fluid >> Repair Procedures >> Replacement

Repair Procedures: Replacement

  1. Shut off the high voltage circuit.

    (Refer to Automatic Transaxle System - "HIGH VOLTAGE SHUTOFF PROCEDURE ")

  2. Remove the under cover.

    (Refer to Engine Mechanical System - "ENGINE ROOM UNDER COVER ")

  3. Drain the coolant of hybrid motor cooling system.

    (Refer to Hybrid Motor System - "COOLANT ")

  4. Remove the ATF drain plug (A), allow the fluid to drain out and then reinstall the drain plug.

    Tightening Torque: 

    33.3 - 43.1 N.m (3.4 - 4.4 kgf.m, 24.6 - 31.8 lb.ft)

    G12347760Courtesy of KIA MOTORS AMERICA, INC.
    NOTE: The existing ATF drain plug gasket must be replaced with a new one. (Do not reuse it.)
  5. Remove the air cleaner assembly and air duct.

    (Refer to Engine Mechanical System - "AIR CLEANER ")

  6. Remove the hybrid power control unit (HPCU) assembly.

    (Refer to Hybrid Control System - "HYBRID POWER CONTROL UNIT "

  7. Add 5 liters of ATF SP-IV through the ATF filler hole after removing the eyebolt (A).
    G12347761Courtesy of KIA MOTORS AMERICA, INC.
  8. Perform the ATF level check procedure.

    (Refer to Fluid - "INSPECTION ")

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