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Do the clutches grab abruptly when you start to creep? I can make mine surge just by turning the power steering. Guess it puts enough load on the motor to start it surging. Clears up quick though. Did this start after changing anything like maybe air filters or anything like that. May want to look at short term fuel trims at idle to. Even if you check them warm it may show something. May be time for Primary O2 sensors also. If you see any discrepancies from bank to bank I would look into sensors for sure. Either way get those maf sensors clean and keep us posted.
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