Gates 37004P Alternator Decoupler Pulley

DriveAlign Overrunning Decoupler Pulley

Fits: 00-11 Mercury Grand Marquis, 03-11 Ford Crown Victoria, 03-04 Ford Grand Marquis, 06-11 Lincoln Town Car

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Gates Alternator Decoupler Pulleys provide vibration isolation within the Accessory Belt Drive System resulting in smoother engine performance and efficiency and increased belt and component life. Line consists of overrunning alternator decoupler pulleys and one way clutches.

  • Exact OE replacement
  • Patented design unmatched by any other supplier
  • Torsion spring absorbs engine vibration for quieter, smoother ride
  • Chosen by OEM to reduce noise, vibration and harshness

Note: Vehicles designed to use ADPs should never use a solid or one-way clutch pulley. These parts are not interchangeable, and failure to install the correct replacement can cause damage to accessory drive components.

Gates - Driven By Possibility

BRAND: Gates


  • DriveAlign¬® Overrunning Decoupler Pulley
  • 2011-00 Mercury, Grand Marquis, V-8 4.6 L, Alt. Decoupler Pulley
  • DriveAlign Overrunning Decoupler Pulley
  • Decoupler Pulley


Bore Diameter12.5
Contact SurfaceV-Ribbed Grooved
ContentsPulley, Dust Cap
DescriptionAlternator Decoupler Pulley
Groove Quantity6
OE Comparison RatingOE Exact
Outside Diameter53
Required Tool Part Number91024-3

W/190A., 200A. Alt.; Installation Tool Required


  • Litens: 920004A
  • Lester: 11026
  • Goodyear: 49935
  • Dorman: 300-869
  • Dayco: 892002
  • Tendeco: 920004
  • ACDelco: 37004P
  • NAPA Belts/Hose: 37004P
  • Carquest: 37004P
  • Litens: 920004


  • 2003-2004 Ford Grand Marquis
  • 2006-2011 Lincoln Town Car
  • 2003-2011 Ford Crown Victoria
  • 2000-2011 Mercury Grand Marquis
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