One problem related to noises during shifting has been reported for the 1997 Chevrolet 1500. The most recently reported issues are listed below.
I have a 1997 Chevrolet silverado 1500 p/u with 115k miles. The transmission started to make a low roaring noise in low gear and would quiet down as it shifted to a higher gear. Over time the noise got progressively louder and eventually made a clanging sound as I took off from a stop. The noise was louder than I've ever heard, so I drove the truck back home a parked it. I've told friends that I needed another transmission and the more I told the more I realized that there was of the same problems in other Chevrolet trucks. This may be coincidence but it's to large of a scale that's costing many people lots of money.