01 crv AT shifiting issues no cel

190,000. honda atf in transmission. when cold, starting in 2 or d its sluggish like limp mode. when it goes to shift up, it goes to neutral. r works only for a few minutes when cold. then nothing, like in neutral. if i start in 1, it drives fine in 1. i have changed transmission with known good one. no change! i suspect electrical issue, checked alternator , its at 14.4 so good. i have swapped out pcm, pgm relay. and no cel. im not sure what to check next.