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Home >> Oldsmobile >> 1991 >> Bravada >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls (Gasoline) >> Input Devices >> Digital Ratio Adapter Controller (DRAC)
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Digital Ratio Adapter Controller (DRAC)

DRAC compensates for various axle and tire ratios by monitoring the Vehicle Speed Sensor (VSS) signal and modifying it before passing it on to the ECM and speedometer unit.

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