OEM:565999This differential gear set cup fits Fuller 4005, 4205, 5005 midrange, and 5205 midrange transmissions, as well as Mack flywheel PTO live power units. Positioned within the differential carrier assembly, it supports the pinion bearing and helps hold proper preload and alignment for smooth gear engagement. It is built as a replacement for these applications.Interchanges:Caterpillar 6S6031Dana 565999Fuller 1314774GMC Truck 7449535GMC Truck 7451156GMC Truck 9418358Mack 3088-1314774Mack 64AX283Navistar 455386C1Navistar 597569C1GCU-6692FeaturesFits Fuller 4005 Series transmissionsFits Fuller 4205 Series transmissionsFits Fuller 5005 and 5205 midrange transmissionsFits Mack flywheel PTO unit (Live Power)Tech SpecsSell Pack: 1 EachAdditional InformationFitment: Fuller 4005 Series, Fuller 4205 Series, Fuller 5005 Midrange, Fuller 5205 Midrange transmissions, and Mack flywheel PTO unit (Live Power) applications.Used in this Mack modelTransmission Flywheel PTO and Miscellaneous Components