sonnax zip kit gen1 10l60 10l80 10l90 10r60 10r80 10r90Sonnax Zip Kit for Gen 1 10L60, 10L80, 10L90, 10R60, 10R80, 10R90 The Sonnax Zip Kit 10L80 G1 10R80 ZIP is engineered to resolve the most common issues in Ford 10R60 10R80 10R90 and GM Gen 1 10L60 10L80 10L90 valve bodies. It effectively addresses pressure losses in essential circuits such as the main line, torque converter clutch (TCC), and clutch apply controlswithout the need for reaming or specialized tools. This kit includes a quick reference