I’m helping my uncle with his tranny rebuild. I’m not a transmission guy and he’s not a internet guy. He’s looking for the race that sits on the bearing in the forward planet. His is broken as seen in pics and we can’t seem to find it online anywhere. Any help is appreciated

 

Your dealership usually can obtain any parts needed, consider giving them a shot.

 

That broken piece is the top half of the needle bearing that goes inside that planetary gear.
I doubt you'll find only half of an item that hasn't been in production for over 30 years.
It's called the #3 Thrust Washer Needle Bearing in the ATSG C6 manual.
I've had really good luck with Transmission Parts Online.
The #9 snap ring broke when starting a rebuild.
They charged me $15 for six different options that had a .002" ID variance.
Good Luck.