Like said, most of us here have not done any trans rebuilding. Also, know that my personal knowledge is limited. However, in the interest of providing information, I searched online and found this as a start:
83-SGVT-22 GM 4T60E Video Tape & Overhaul Manual $61.66
On this site
, that also sells the rebuild kits.
rebuild kit for your trans:
DK8400E GM 4T60E 1991-UP $441.17
Note that you can also buy HD rebuild parts that will help it last longer. Some are available on this site.
Also note what we have said above, recommending leaving transmission rebuilding to the professionals. I definitely don't recommend doing anything without first buying and studying the manual and tape above. If you do go the rebuild route, I'm sure we would be interested in seeing pictures of it all.
Google is your friend...
Mike: 1997 SE w/ 183K, aka White Horse
, Gutted Airbox w/K&N, drilled 180* t-stat, tint all around, clear corners w/SilverStars, "PONTIAC" light up tail, PEMs, NGK TR55s