Volvo Repair: Volvo - 2001 S-80 T-6, volvo dealer, mechanic

Question
I have Volvo 2001 S-80, T-6 and in the morning I started my car and it will drive reverse but not forward and we ask mechanic to check on it and he checked and said that nothing wrong with transmition. Can you help us solve the problem.
Thank you.  

Answer
        Greetings,
                 I must disagree with your mechanic...get another opinion...from your friendly Volvo dealer...check if a T S B on this model has been posted.
                 COMPUTER?
          Good luck,

                     Bilbo