Those splines hold the wheel bearing assembly together along with the axle nut that must be set to the specified torque, which is real high.
A somewhat common cause of a squeal, only when moving, on older Chryslers is the axle seal in the transmission. I suppose the same thing could happen to other car brands. If you spray behind the inner cv joint with Spray White Lube, the noise might go away for a day or two. That's a Chrysler product that I'm familiar with but other spray lubricants will likely work too. Spray White Lube is a lithium-based grease that is very runny at first. The juice runs into places and takes the grease with it, then the liquid evaporates and leaves the grease behind. One clue to help find the noise is it will still occur when the front end is jacked up off the ground and it's running in gear with no weight on the wheel bearing or suspension.
Wednesday, October 12th, 2011 AT 9:26 PM