Gates 37018P Alternator Decoupler Pulley

Gates 37018P Alternator Decoupler Pulley

The Gates 37018P alternator decoupler pulley is built for accessory drive systems that need smoother alternator operation during engine deceleration. It helps the alternator free-wheel on overrun, reducing belt shock and vibration while supporting quieter, more stable charging system performance.

Key Features

• Gates DriveAlign decoupler pulley for alternator applications
• Steel construction for durable service in the accessory belt drive
• 6-groove V-ribbed grooved contact surface
• Flanged design for secure pulley alignment
• OE Exact comparison rating for direct-fit replacement needs
• Includes pulley and dust cap
• Requires installation tool 91024-3

Product Details

Gates BrandLine Decoupler Pulley products are engineered to isolate vibration within the belt drive system and allow the alternator to overrun when engine speed drops. That action helps reduce stress on the belt path, supports smoother engine performance, and can extend belt and related component life. Part number 37018P is a steel, 6-groove alternator decoupler pulley with a 53 mm outside diameter, 49 mm width, and 12.5 mm bore diameter. This part cross-references Dayco 892004 for the same application. It is a direct replacement choice for select Dodge Journey, Jeep Compass, Jeep Patriot, Chrysler 200, Dodge Avenger, Dodge Caliber, and Chrysler Sebring applications.

Vehicle Fitment

• Fits 2009-2015 Dodge Journey, N/A, decoupler pulley
• Fits 2007-2015 Jeep Compass, N/A, decoupler pulley
• Fits 2007-2015 Jeep Patriot, N/A, decoupler pulley
• Fits 2011-2014 Chrysler 200, N/A, decoupler pulley
• Fits 2008-2014 Dodge Avenger, N/A, decoupler pulley
• Fits 2007-2012 Dodge Caliber, N/A, decoupler pulley
• Fits 2007-2010 Chrysler Sebring, N/A, decoupler pulley

Common Issues This Part Addresses

• Alternator pulley noise during deceleration
• Belt vibration in the accessory drive system
• Harsh belt loading when engine speed changes quickly
• Premature wear on the belt and related drive components
• Charging system instability caused by pulley drag or overrun issues

Installation Notes

Use the required tool part number 91024-3 for installation and removal. Verify pulley groove count, bore diameter, and OE-style dimensions before service. Confirm the alternator decoupler pulley type matches the vehicle’s original design, since overrunning alternator decoupler pulleys and one-way clutches are not interchangeable.

Quality Assurance

Gates DriveAlign alternator decoupler pulleys are built to OE Exact standards for the listed applications and are engineered to support proper accessory drive operation in compatible Dodge, Jeep, and Chrysler vehicles. The Gates 37018P is part of a product line focused on vibration isolation and controlled alternator overrunning in belt-driven charging systems.