Lincoln 5L3Z-4A376-A Drive Shaft Assembly

A driveshaft is the tube or tubes that move power between the transmission and differential in the rear axle. All driveshafts need universal joints at each end, and a center bearing needs one behind it on two-part driveshafts at the back. The U-joint serves as a double-hinged tool that moves power from one shaft directly to another shaft at an angle. The regular U-joint connects two shafts by fixing Y-shaped yokes at 90-degree angles, with the force passed through the sq. center bearing we call "spider." All rear driveshafts have a slip yoke at the front that lets the driveshaft move up and down inside the transmission, stopping oil leaks and keeping dirt out with a special oil seal. When a car has two separate short driveshaft pieces, a middle mounting point is located on a rubber cushion built into the vehicle frame to support the transmission and prevent dirt from entering. At the back, all rear driveshafts connect the rear axle differential pinion flange through a flange yoke held in place by four bolts that prevents leaks by using a seal. The driveshaft mainly needs little attention, with the universal joints self-lubricating for their entire lifespan before possible issues require removing the drive shaft from the car for repair. We should clean the driveshaft well and make sure small weights meant for balancing are there, checking the shaft for damage when we do. When you drive and notice a strange noise or feel vibrations, a test drive can tell you if they come from your driveshaft or another part. Checking the driveline for problems is best done if you think something is wrong.

Before removing the front shaft, remove the rear one in a two-piece driveshaft. Make sure you jack up the vehicle and secure it well. Match the driveshaft to the mating flange of the rear axle assembly. Unbolt universal joint clamps or drive shaft flange from differential pinion flange. Pry away the universal joint and remove the shaft. Lower rear end of the driveshaft. As a one-piece unit push front end out of the transmission extension housing. Put plastic bag around extension housing. Take off the bag and clean area. Check the oil seal and center support bearing visually. Insert driveshaft into the extension housing of the transmission or transfer case with its front end first. Raise the back end of the driveshaft in position and fix clamps with fasteners.

The three different types of universal joints mentioned are. Single-cardan: This type has one U-joint and is capable of angular movement in one plane. Double-cardan: Also known as a constant-velocity joint (CV joint), it has two U-joints and can transmit power with less angular variation. Constant velocity: This type of U-joint maintains a constant velocity, resulting in smoother power transmission at various angles.