I got this yesterday when I started back up. I am going to try and get codes tonight. However this is whats happening. When from park and put into R it slowly grabs then seems to lose movement. I can go back to park and into R again same thing. Then when going forward it will shift but it seems to take along time getting into next gear. and wont go past 3rd or 4th cant remember. When in gear it seems fine. I looked it up on here and came to a conclusion that it could be NSBU or the pressure solinoid. It was rebuilt like 10k with no problems. Im just stumped and it seems electronic. Any help would be appreciated. Thanks