Daveinet...
Sounds like you are well versed on these and also that it sounds to be a very good transmission. What did they do to improve it with the 4L85E and can it be upgraded either easily or with a rebuild.
We arrived at our destination today and I found some more parts to grease with wishful thinking, since the shift lever was tight when we left this morning as per usual, but did loosen up to normal right on schedule after a few miles of driving.
Checked the oil upon arrival and just right in the upper part of the cross hatches.
Haven't made any attempt at reseting the ECM as yet by disconnecting the chassis battery, so should I just leave it alone to learn on it's own or what?