MaxGz26

Hello Acura/Honda Lovers/Owners. I have a 97 acura CL, just purchased used ofcourse, and not even a week of driving and the transmission is slipping horribly. It use to rev up to 5K b4 it will actually catch and shift, but now it just keeps going. I have a trouble code for a torque converter and another for the transmission. I have been reading that for a filter change I must pull and take apart the transmission, is this true? Also would anyone know if maybe doing a filter change or changing the torque converter would help? All advice is happily accepted. Thanks.