Rear differential (4WD)

Checking or changing rear differential fluid
Have rear differential fluid checked or changed by an Authorized Kia Dealer according to the Maintenance Schedule at the beginning of this section.

Use only the specified rear differential fluid. (Refer to "Recommended lubricants and capacities" in section 8.)

    See also:

    Key
    Illuminated ignition switch Whenever a front door is opened, the ignition switch will be illuminated for your convenience, provided the ignition switch is not in the ON position. The light will ...

    SOLID RIDE WITH POWER TO SPARE AND EXCELLENT FUEL ECONOMY
    In terms of driving characteristics, the Optima is very much in keeping with the Hyundai Sonata, which shares the same platform. The cabin is quiet and the drive is smooth, with the Optima feeling ...

    Vehicle weight
    This section will guide you in the proper loading of your vehicle and/or trailer, to keep your loaded vehicle weight within its design rating capability, with or without a trailer. Properly loadin ...