[coyled]

Tom, the inside is pretty simple on a tremec. I have had this problem before. Each syncro assembly has 3 rectangular detents that engage the gears. These detents break off at the corners from down shifting. It will still upshift ok but will not downshift. I have had this happen on 2 tremecs. When you pull it apart, you will see what I mean. If the syncros were bad it would grind like crazy. Scott