Part Question for Auto Trans Gurus

@monc440 Here is a good site to see the exploded view of the a500.…yeah, thats the one I was looking at
I was figuring on the “extra parts” concept, but I thought I was careful about keeping the new parts separated. But it was a good number of months
@moparlvr166 all good suggestions, but I guess I won’t know unless I go through it all again. leftover parts bug me out just for this reason. Not so much on most things, but somewhere something can go drastically and costly wrong after you’ve done a ****-ton of work, arrrggg
My neighbor did say he came over while I was out of town and rearranged some stuff for me, lol, but I’m sure he was pulling my leg.
“I have not worked either one of those transmissions”—— other than the overdrive, the front half is essentially a 998 variant of the A904. So much so that I also bought Tom Hand’s book on rebuilding the 727 & 904. Don’t see that ring in there either, nor in the ATSG A500 manual.