700R4 Teardown and Inspection: Rebuild Gone Wrong

I take in a 700R4 from a customer in IL who rebuilt the transmission and was only able to put 20 miles on it before issues began to surface. He asked me to inspect the transmission to determine what went wrong, rebuild it to ensure it lasts, and improve its shifting characteristics. This video shows what I found upon tearing into the unit. The video is divided into sections: Overview (0:00), Walk Around (2:01), Underbelly (5:13), Case Teardown (31:55), and Autopsy (1:08:46).