Hi, the 9/16-36 splines on the lower portion of the upper steering shaft on my car are worn out. I don't know the history on the car so I am not sure if this is a stock configuration. This lower shaft is 12" long. It has 9" of 3/4" diameter tubing at the top. then the 9/16-36 shaft extends for about 2.8" from this. A spherical bearing 9/16 x 1.09 is over the 9/16 shaft and then a 2.25" piece of 11/16 tubing is slid against the bearing locking it in place. Has anyone had to fix the splines or any other suggestions would be appreciated. Thanks, David