O.K., my bad here. Just as Bryan at Rock Auto informed me, if I had looked a little farther down the page, I would have seen the axle with the desription "pre 04/00". Went ahead and ordered the correct axle for the drivers side and will do the install when I can get some time off of work. The axles I purchased from Rock Auto are AUP/Automotive Undercar Products. The splines were the same pre and after 04/00. the difference was in the diameter of the outside of the outside CV that recesses into the hub.