Axle Shaft Constant Velocity Joint
WARNING: This page is about a different car, the 2003 Pontiac Aztek, 2003 Buick Rendezvous, 2002 Pontiac Aztek, 2002 Buick Rendezvous, and 2001 Pontiac Aztek. However, it is still accessible from the selected car via links, so may be relevant.
The front axle shaft constant velocity joint is of the Rzeppa joint design. The shaft end, which mates with the knuckle/hub, has a helical spline. The helical spline ensures a tight, press-type fit. This design prevents end play between the hub bearing and the front wheel drive axle.