GearWrench 3900 Universal Pulley Holder GearWrench 3900 Universal Pulley Holder applications for use fan clutch removal works with ford trucks w/2.8-l, 2.9-l, 3.0-l, 4.0-l, 4.9-l, and 5.0-l engines, gm trucks w/4.3-l, 5.0-l and 5.7-l engines ,dodge trucks w/3.9-l, 5.2-l, 5.9-l, 8.0-l and v10 engines.