The new axle fit great. It was a "Tom's axles" brand. I found his home site at tomsdifferentials.com I bought his axle through West Coast Differentials and they took care of my problem (still waiting for credit for the defect though). They said they only had one more of the defective "sierra" brand axles left for the Pontiac. I don't know for sure what they intend to do with it, but they did verify that it would not fit before they sent me the good replacement.
