If you're looking for a quality replacement greaseable U-joint for your Cummins, then this MOOG unit is what you're after. MOOG U-joints are precision-manufactured to exacting standards. They have forged and case-hardened alloy steel crosses and heat-treated needle bearings, cold-formed radial bearing cups for 360 degree lubrication distribution, superior quality seals, and a grease fitting in the cross body for easy maintenance.MOOG warranties their products to be free from defects in materials and workmanship for the life of the product.