If it's making a grinding noise while up shifting or down shifting, you better get it in to the dealer asap. Something isn't right. A Co worker has a new hemi ram and had his tranny replaced under 4000 miles. Ram has had a bad reputation in the past on trannys, but so far this new tranny I've herd of very few issues. ....actually his and your possible problem are the only I've herd of.