I checked the tranny fluid and it seemed a bit low. Added about 1/2 qt. or so. Drove it and it ran fine. The engine was normal temp. though and I had the issue when vehicle was cold. I'll wait until engine is cold and try to drive it. Tranny fluid looked and smelled fine by the way.
I did manually shift gears between first and second and nothing unusual...will try that again when engine is cold.
When I had the problem the tranny seemed to shift into second at the normal time. It did not shift any sooner or any later. Just shifted hard at the normal time.
I should add, after the tranny shifted hard a few times I tried easing from first into second by driving slower...seemed to shift OK that way. Like I said before though, once it warmed up every gear shifted normally.
Thanks for all your help. I'll post later with an update,