700r4 shift issue

[Coach]

Thought I would re-post this since I sent it out originally last night. Just developed an issue when the tranny makes the first 2-3 shift of the day. The 1-2 shift is fine, the 2-3 shift lags behind, rpms go higher than they should and then finally makes the shift to 3rd. It doesn't happen the rest of the time driving, only that first shift of the day after it has been cold sitting overnight. Not sure if it could be the TV cable or a stuck valve. Had the tranny rebuilt less than 1100 miles ago and installed the Bowties Overdrive TV Made-Easy kit installed at that time as well.