The OP did not tell us if the trans fluid has ever been changed on this 8 year old car, but I surmise that it has not. In that case, it should definitely be changed--but NOT flushed.
As to the preceding comment, I am going to compare that person's situation to the patient who dies on the operating table during a Quadruple Cardiac Bypass operation. That patient would have died if he did not have surgery, and was unfortunate enough to die during the surgery that was necessitated by his poor health. Both instances of death would have been as a result of him not maintaining his health properly for the preceding X number of years. In other words, that surgery may give the patient a few more years, but it cannot be counted on to overcome years of neglect of one's diet and exercise regimen.
When the person above changed the fluid on his 2000 S40, it was likely very much overdue, and as a result, the trans would have failed anyway. This type of "Hail Mary" servicing of an older transmission rarely works.
What does work is changing the fluid (and filter if so equipped) every 3 yrs/30k miles. People who follow that type of schedule rarely experience transmission problems. When trans fluid is not changed on that type of schedule, whether the fluid is first changed after many years of not being changed or whether the fluid is left alone, the trans is going to fail--usually anywhere between 90k miles and 140k miles. Such is the price of neglect.