I’m using 90 wt gear oil in my A-833 and it grinds first to second until the oil warms up. So when you say after a trip around the block it shifts normally first to second, could just be the oil is too stiff.
Man is that good timing! I pulled it out cold today to make a parts run and it was grinding a little going from 1st to 2nd. I was thinking "what could I have missed in the rebuild to have a random grind like this!?" And it did smooth out after a couple signal lights.
