5.2 Drive Axles and Constant Velocity Joints

On cars with front wheel drive, the drive wheels must also be able to turn for steering. The drive axles are equipped at each end with constant velocity (CV) joints which allow power to be continuously delivered to the drive wheels-even when all the connections are not precisely straight. The CV joint is similar to older-type universal joints in function, but it operates much more smoothly at more radical drive axle angles.

The inner CV joints attach to the transaxle drive flanges, while the outer CV joints are equipped with splined stub axles which engage the splines of the wheel hubs and are secured by the large nut. Each joint is packed with a special molybdenum disulfide grease and completely sealed by a rubber boot. Although some inspection of the CV joints and even replacement of the inner joints are possible while the drive axles are installed, complete inspection and thorough lubrication of the joints requires that the drive axles be removed from the car.

If the drive axles themselves are damaged, complete remanufactured drive axle assemblies are available from an authorized Volkswagen dealer at lower cost than a new unit.