Alto has introduced a new line of forward and direct .060-in. steel plates for GM applications. Transmissions covered include: 3L80/TH400, TH375, TH425, TH475, 4L80E and 4L85E.
According to the company, the early Alto numbers are the late OE design with 8 full teeth and 4 partial teeth. This was done in an effort to reduce cost and material. When used with the stock production engine, Alto says it will perform without any problems. When used with high-performance engines, there is a chance for diminished performance, the company notes.
The late Alto numbers have a set of 14 full teeth like the early OE design, which the company says will enable the steel plates to handle the increased horsepower and torque produced by high-performance engines.
The company notes that this update will affect Modules and Powerpacks that include these steel plates.
