Automatic Transmission Service Group
ATSG is a Technical Service Advisory and membership organization. ATSG acts as a clearing house/referral service for its members. With respect to transmission maintenance and repair, it provides technical bulletins, a telephone hotline to answer questions from member transmission shops, and training seminars.
ATSG also administers a warranty membership program called the ATSG Advantage Warranty Program, whose members, in effect, "guarantee" each other's work by agreeing to correct any defects in workmanship and materials in correction with work done at another participating shop.