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    2004 Mercedes Benz SLK230 2.3L SFI DOHC SC 4cyl

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    Use Code: FALLSAVINGS

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    Companion Flange

    Inspect/Replace

    • The driveshaft connects to the differential either using a companion flange or a pinion yoke.
    • Check for obvious damage, bends, and missing weights. Weight will either be on the front of a flange or the outside depending on whether the correction was for flange runout or differential balance.
    When there is a weight on a pinion flange, it was put there to correct for runout.
    • Runout on the flange is checked with a dial indicator. It is limited to 0.0006” when there is no weight on the flange.
    • A hardened pinion seal can wear a groove in the mating surface of the companion flange or pinion yoke. the flange will need to be removed and visually inspected. if a wear groove exists, there may be a repair sleeve available to avoid the cost of replacing the part. replace the pinion seal.
    Look for a wear groove caused by a hardened pinion seal rubbing against the pinion yoke (top) or companion flange (bottom).

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