GMB Standard Universal Joint (220-0088) Journal cross is high-quality alloy steel forging. Journal crosses are heat treated in a carburizing process that produces bearing-quality case-hardened steel which maximizes life expectancy. End lube option features the grease fitting in the bearing cup. Bearing cups are carburized and case hardened to a uniform depth for strength and durability. Cups are precision ground for precise lock-up tolerances and exact fit in mating yoke ears. Needle bearings are sized for maximum load-carrying capacity.