naciamaj - where abouts are you located at? if you want, you can bring the car where im at and i can maybe diagnosis it a little better but it does sound like you are going to need a tranny rebuild. another problem could be the TOB or the clutch so we cant really say if its either/or at this time.
trk1991 - who quoted you on the $650? i think jerry(lancerman) might be able to do it for cheaper and everyone on here and TBDSM can vouch for his work. i too can vouch for him. you might want to look him up before you do anything.