tranny slips and doesent shift after rebuild
 

I just rebuilt the tranny in my truck and it does't shift right and it slips. i usde the old valve body in it, any help would be great. it has a dtt tq converter and a dtt master rebuild kit. is there any way it could be the valve body or the band adjustment. i need the truck to drive to work and back so any ideas would be great. thanks :argh: