Automotive Repair Glossary : Overdrive Definition

Overdrive Definition: Any gearset in which the output shaft turns faster than the input shaft. Overdrive gears are used in most modern transmissions because they reduce engine rpm and improve fuel economy. Occasionally, a separate gearbox with an overdrive gearset is coupled to a conventional transmission. A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z   OBD II Octane Number Odometer Off Center Steering Offset Ohm Ohmmeter Oil Consumption Oil Cooler Oil Drain Plug Oil Filter Oil Gauge Oil Pan Oil Pressure Oil Pump Oil Open Loop Open PCV System Orifice Tube Original Equipment Out Of Round Outer Or Outboard CV Joint Output Shaft Over Inflation Overall Diameter Overdrive Overhead Camshaft Overhead Valve Overheating Overload Shocks Oversteer Oxidation Catalyst Oxidation Inhibitors Oxidation Oxides Of Nitrogen Oxidize Oxygen Sensor Oxygen Ozone Depletion Ozone Layer Ozone

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