Some places used to sell what they called "slip in bands" for certain tranny's. It was so you could replace the band without taking the valve body out or loose. I remember years ago I put one in an auto trans but I forgot what brand car it was. What you did was cut the old band while in the trans with sheet metal cutters so you could slip it out. Then the slip in band comes with the one end removable so you could slide it in and around the drum. Then you put the removable end and the band strut back on and adjusted it. I only did one about 33 years ago as I don't even know if they still sell them type of bands. Ron