No codes in it, I let it sit for about 5 hours and when I went and drove it, it shifted smooth as butter, I'm not quite sure what the issue is unless its overheating on these slightly longer drives?
Alright, so I have a 2000 GMC K2500 (Classic) with a 4l80e, I've been having constant issues with it since I bought it. At first, the trans pan was leaking pretty bad, about a quart a day or so but it was my only vehicle so I just kept adding fluid and driving it. I've put a pan gasket on it...