I just purchased a 2003 Cadillac Seville STS with 28,000 miles on it. When i test drove it everything seemed to be okay, but after driving it about 200 miles I noticed that sometimes if I would accelerate fast off the line, the shift from 1st to 2nd gear would be so harsh that the tires would screech. I thought that maybe the transmission fluid was low, so I checked it and it was up to the right level and it wasn't a nice pink color. I went to pep boys and got a bottle of Lucus transmission slip/repair. I put half the bottle in the transmission and now it shifts like silk through every gear. I was amazed that half a bottle of liquid could make such a difference. I was just wondering if anyone else had a similar problem, or if anyone thinks that this is only a temporary fix??