722.6 excessively hard shifts 1st AND 2nd when cold

[Will_w202]

This transmission has had a lot of warranty work, and it's becoming almost comic how it develops some new behavior seemingly every week. I normally drive in flat ground and not very hard, but spent the weekend in the mountains, so the car got used to a lot of hills, curves, and leadfooted acceleration (because it really does suck wind at high altitude). Anyway, the car sat for 2 days, where mornings were cool (low-60s) and dewy. I started it up yesterday, idle was rough, and when I drove off it had a harder-than-usual jerk into 2nd gear, AND into 3rd. I've never had it kick so hard in either gear during a cold-start, but it never at all kicks in any gear beyond 2nd. Seems to be ok otherwise.

History - since 65k, fluid and filter, trans computer, conductor plate, shifter assembly mechanism, shifter bushings.

Could it be the valve body? What are the symptoms of a failing valve body even if that's not what you think it is.