727 stuck in third

TrailBeast said

It does sound like welded together direct clutchpack unless I'm just gettin old and wish I knew what I used to.
Bet that second gear band is burn't to hell and they changed the fluid so it looked clean.
The torque converter can dampen what you percieve as hanging up
Wish we could drive it and see.

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I thought about that too but since he said manual low doesn't make a difference I didn't mention it because if the rear band/servo is working it'd bind up and not move at all in manual low if it's stuck in either 2nd or 3rd. But again that's going on the presumption that everything else is working correctly.