65 barracuda needs help !!!!

my transmission seems to shudder a little bit when i take off till it hits second gear,it is an automatic 904,with a 273 motor.I had an old chrysler mechanic come by a car show were my car was,he asked my to turn it on and told me that he hears the torque convertor making noise.He says sometimes the have a bolt that loosens up.Any suggestion would be appreciated.