Wear Item Fan Pulley Hub Bearing 04429639 Compatible with Ram 2500
BD35-12DU8A Fan Pulley Hub Bearing, 5.9L/6.7L Diesel, Dual-Lip Nitrile Seals — compatible with Ram 2500–5500 series trucks spanning 1998–2012 model years. Replacing this wear item on a mileage-based schedule prevents cascading damage to the water pump, fan clutch, and belt tensioner. Evaluates best when the cooling system shows early wobble or belt whip symptoms, supporting both single-unit swaps and fleet-level preventive planning. Replacement interval guidance included with shipment for maintenance scheduling accuracy.