also don't forget the 700r4's cousin the 200r4. These transmissions came out of buicks and in the opinion of many GM guys is a better transmission and has better spaced gears.
also, for those of you who didn't know the 700r4 later became the 4l60 and eventually 4l60e. these transmission with the exception of minor changes are all the same unit.
if im not mistaken there torrent for a video which ATSG made regarding the workings, rebuild, and tricks to the 700r4. I also have pdf's of the service manuals if anyone is interested.