Well
Now I'm not sure what to advise, stumped here. Darn. And it's extremely difficult to find any parts list to prove your transmissin is the one that matches your seal. I have yet to find any PN's for mine, I just look for anything marked Norge, Montgomery Wards, Magic Chef, and if it looks like my machine I buy it. The seal you got is the only seal I know of, everything about your machine looks exactly like my 1978 spindle, splined post, etc. I bet your old worn seal looked about exactly like the new one, right? Did you clean the innards of the splined post so the seal seated well? I'm just asking everything I can think of because I am stumped.
What exact year is your Norge? It must be one of the last before they ended production of this old technology.
Hopefully someone else here will be able to give better advice. I will be watching to hopefully learn, and thank you for your pics and getting back on this website after vacation.
I truly hope all goes well for your continued use of that Norge, I hope my advice proves that, but I must say that if nothing works and you decide on a new machine, I may be interested in your washer. My 1978 is currenlty out of commission, difficult repairs, and maybe various assemblies swapped from one to the other will get one back into working order in my basement. But I'd rather see the correct advice given here, a success story that will get both of us back to that loud Norge wash.