I drove the car on a 35-40 mile road trip yesterday and, after pulling off the freeway, I began to hear an intermittant "clacking" sound from the engine compartment. It was most obvious at idle. At one intersection I got about three consecutive "clacks" and began hearing the typical screech of a slipping belt. I babied it home and examined both the PS pump and the alternator. No suspicious look about either and the belts were both nice and tight. The fluid level in the PS pump was slightly low so I added a little ATF, but I noticed the fluid smelled slightly burnt. I took the car out this morining and ran it hard on the freeway for about 20 miles, but it ran like a dream and I couldn't reproduce the noise. I need to resolve this problem because I've got a pretty full event schedule for the next three months. Does any of this sound familiar? Help!