One problem related to transmission gear slipping has been reported for the 1999 Kia Motor Sephia. The most recently reported issues are listed below.
Have had my car in several times for service and was told that it was the way I dirve. . . I then began taking my car to dale spradley in pueblo CO for warranty service. . . I was told that they reset computer on the transmission and it would have to adjust to my driving again. . . My problem is the transmission slips when cold as soon as you put it in gear. Sometimes does it after being driven awhile and you let off the gas to make a turn it will act as if it is in neutral and then finally drop into gear. It is really hard for a woman to get good service as service department (men) employees think we have no idea what we are talking about. I have been treated vey rude at phil long Ford and recnetly at dale spradley. . . I now have an appointment to have the breaks checked as they are making a horrifying noise when I apply them. . . Something I had ask twice to be checked prior and was told nothing was wrong with them. . . Neither of these dealers have ever given me any type of receipt that my car had been serviced. . . I had to have the drivers seat cuhion replaced as the vinyl side split out and have no receipt of that. All they say is it is on record in the computer. . . I would still like to have a copy for my records.