Here's a simple pictoral essay on rebuilding a Buick Super Turbine 300 (ST-300) 2-speed transmission. It's not a complete, step-by-step guide, mainly because I didn't stop and take enough photographs. But, it is a good overview of what's involved in rebuilding one of these simple transmissions. If you wish to tackle this job yourself, then you'll need the appropriate "Buick Chassis Service Manual" or "Chilton's Auto Repair Manual" for the complete steps. (The Chilton's manual may be available in your local library - the 1964-1971 edition works for me). If you decide not to rebuild it yourself, at least you'll gain an appreciation for what a tranny shop will do for you. So, without further ado, here's the fun!