Description According to the factory service manual, the front hub bearings should be repacked every 6,000 miles/10,000 km. To repack the bearings, you just require grease and a new seal. However if your bearings are damaged as many people do not repack their bearings frequently enough, you will need this kit. This front hub kit is all hardware you need to rebuild one hub on a D250/D350. Kit includes: #19 Inner race and bearing – Mopar 1937771 #22 Outer race and bearing – Mopar 1790546 #18 Grease seal – Mopar 3820197 Two sets required per truck. This is a Mopar authentic Restoration part made by the original manufacturer.