This is Trans Tech Index. Years of work went into logging all the technical seminars, bulletins and trade magazine articles possible to compile an intense list of material to help solve almost any transmission problem.
To purchase the ATRA or ATSG Seminar and Bulletin DVDs to start your own data base. Just click on their Home Page buttons located on the left side or go into the Trade Links page and click on the individual icons.
Just click on the icon below for a sample of the technical material listed that can be found for the GM 4L60/60E transmission.