hi the smaller of the 2 doors is a band servo for second gear and its the one with the real tight spring - the last one i did was a PitA the thing can snap the tip of your finger real good ( it can take a piece off ) soooo caution should be used -- and the O ring i a thing to get back in NO glue can be used as it will make its way into the valve body unit - i have always droped the rear cross member and part of the exhaust to get the back of the unit come down as much as possable Again their is a special tool for the job on the bench and using crow bars to remove it is the easy part -- getting it all back together and have it not leak even more is the trick -- a trans shop that is human can do it in an hour on a lift -- jz