I've lurked here for a few years and found most of the answers to my questions by searching the forum, but on this one I couldn't find the answer.
My daughter has a 98 Legacy OB with 220,000 miles on it (new head gasket and all that goes with it at 190,000), in the last few weeks it started not wanting to shift up from 1st to 2nd when its cold. After the first up shift it will work fine the rest of the day unless it sits all day when she's at work, then that first up shift will be an issue again. It will shift solidly from neutral to either Reverse or Drive with no hesitation or slipping, it's only that first up shift that is a problem.
Before I take it in I wanted to try a few things, so I drained the 3-4 quarts of fluid from the pan and rellied, no change, then drained some out and added Trans X. The result is it shifts great after that first up shift, but it still takes about a 1/4 mile for it to make that first shift, so far no real change.
The fluid looked great before this and had been change a little over a year ago.
Thanks for reading this.