Alrighty, Thank you for the info, Carl.
I did not know I could buy just one axle.
Which leads me to my next question. Should I just buy the pair and replace them both?
Oh, in my mind, just depends on how old/number of runs on them. I did put in a new set on my car around 2000 and probably have 300- 400 runs on them now. If I were to break one now, I would buy a set and keep the other for a spare. There is no right or left when bought new. However, once you put a load on them, the torsional effect will now determine which side they belong on. As a matter of fact, I broke my gear box last night

. I broke a 4.11 first gear. That mainshaft was installed in 1998 and probably has 500-600 runs on it. I guess I got my money's worth on that 1st gear. Time to freshen the old box up. Carl