After an evening of measuring the pressures on the various service ports of the torqueflite, the governor seemed to be the most likely spot to hunt for the flaw.So off it went.
The only part of the transmission that wasn't taken apart during the overhaul.
And what do you come up with when you dig down into the most intimate parts of that piece of iconic american iron?...
...a bearing "made in Japan" :-)
A ring on the governor turend out to be responsible for the problem, it will be replaced soon.