For anyone doing this job, I recommend ordering a new transmission thermostat with the tank. I cannot image a way to get the tank out without breaking it. The plastic is old and brittle.

Thermostat is just pushed in and held in by the O-rings much like the hoses. I am gonna lube it up just in case I need to take it back apart.

Got a new thermostat from Napa for $86, expensive but they were able to special order it and have it to me in less than 24 hours on a weekend. If it was Monday I would have ordered it from Oembimmerparts and had it overnighted.