A U-joint (the “U” standing for “universal”) is a type of flexible coupling typically used on both ends of the drive shafts in rear-wheel and four-wheel drive vehicles. Each U-joint consists of a four-legged centre cross with needle-bearing cups on the ends of each leg of the cross. The bearing cups on one pair of legs are mounted to the drive shaft. The other pair of cups is held in place by a pair of U-bolts attached to a yoke that mates to either the transmission or the differential. The bearing cups allow the joint to swivel and bend as the drive shaft follows the motions of the differential and axle as the suspension bounces up and down. A constant velocity (CV) joint does practically the same thing as a U-joint, only better. There are two basic types: “ball-and groove” CV joints and “tripod” CV joints. Ball-and groove CV joints, which are used as the outer joints on most front-wheel drive cars and minivans, consist of a cup-shaped outer housing, a centre race and cage assembly. The tripod style of CV joint consists of a three-legged cross or trunnion with roller bearings on the end of each leg. The trunnion is attached to the drive shaft, and the roller bearings run in machined grooves or channels in an outer “tulip” housing. This type of joint is also designed to plunge in and out, and is used as the inner CV joint on most domestic front-wheel-drive vehicles. CBC has a wide variety of universal joints and constant velocity joints available in store to meet your needs. Our team of expert staff have many years of experience in the selection of the correct joints to meet your requirements. You can rely on our team to assist you through the selection process. We stock a huge range of brands including Hardy Spicer and NTN. Pop into our branch or phone us today for more information.
