727 missing spring

Happy to hear you found the issue. For what it’s worth, I don’t build a single transmission using the accumulator spring. I use a blocker rod on every unit including street transmissions. Not using a spring or blocker rod and letting the accumulator “float” is just fine.
Okay yeah I mean the transmission shift smoother than my Lexus however I didn't know that would be the outcome leaving the spring out ... I was a little bit worried about it being detrimental to the health of the transmission but it looks like that's not the case.. next time I do one of these I might put a rod in there... But for cruising around town in the Newport I think it's fine the way it is I don't need any harsh shifting for the land yacht