My first intrepid was a '94, and the transmission went out in it at about 80,000 miles. I have purchased the warranty, so it was covered, but it was an over $800 US repair. I would check if the transmission is original, and if it is, has it been maintained or serviced? If it has been replaced, and they do it like mine, there is a sticker that will be in the engine department with the date that the transmission was flashed (reprogrammed).
Hope this helps!