Alto has introduced a three-piece molded piston kit for GM Hydra-Matic 9T50 and 9T65 nine-speed transmissions. The kit (part no. 232670) covers model years 2017 and on. It contains three pistons: the 6-7-8-9 balance piston, the 5-7 reverse apply piston, and the 3-8 apply piston.
