My forward friction bands looked virtually un-worn when I checked them out. But I've got 120k mi on my wagon. When you have the front side of the tranmission out you can see why it made a clicking sound in reverse. I could actually see deep metal scratches on the back side of the front pump cover from the worn B3 friction bands allowing the forward clutch basket? extend out further...hitting the front pump cover...causing the clicking while in reverse. Make sense??? If anyone ever hears a clicking in reverse, know that metal shavings are in your transmission.