Alto has introduced a new steel plate for a variety of GM transmissions. Applications covered include the 3L80/TH400, TH375, TH425, TH475, 4L80E and 4L85E for model years 1990 and on. The forward and direct steel plates have 14 teeth and measure .077 in.
According to Alto, this updated steel plate has a set of 14 full teeth like the early OE design, which will enable the steel plates to handle the increased horsepower and torque produced by high-performance engines.