http://s736.photobucket.com/albums/x...rent=002-3.mp4

this is what my transmission does when it tries to shift from 1-2. It doesn't slip when in reverse or first so I'm thinking it's got something to do with the solenoid pack or valve body. Shouldn't be too hard to fix. I saw someone else with this problem but I can't find it again. Anybody have any ideas?