One thing I forgot, If you replace the solonoid pack yourself, also put a transgo shift kit in the valve body. This could also be part of your problem and whether you do a full rebuild or not, really has to be done. You do not need to pull the trans to rebuild the valve body, it is in the same area as the solonoid pack. You can get the shift correction kit at
www.bulkpart.com for around 30 dollars