Description PACCAR Fan Clutch Replaces OEM: 989883, fits Kenworth and Peterbilt with a PACCAR MX13. Unrivaled quality and performance make GoldTop fan clutches an unbeatable value. The Auto Lock feature prevents on-the-road failures. 3 Year/300,000 Mile Warranty The key reason for premature spring-engaged fan clutch failures is LACK OF TORQUE. There are fan blades in operation today that require more torque than current fan clutches can produce. The GoldTop fan clutches pack over 5,000 inch-lbs of torque. Enough to handle nearly any size fan blade. The patented Auto Lock feature will AUTOMATICALLY LOCK UP fan clutches when the friction material nears the end of its life, allowing the vehicle to finish its trip. Repair or replace the fan clutch in your shop, at your convenience. No outside labor costs or tow bills. *There is a $250 core charge. Cores can be returned for a $250 refund. Fill out and print the form below, and add it to the return box. Send cores to: SP Truck Parts Core Return 30026 Beverly Rd Romulus MI 48174   Fan Clutch Core Return Form