GM TH475 Archives - Transmission Digest
Alto adds to intermediate clutch PowerPack line for GM transmissions

Alto has introduced two new products in its intermediate clutch PowerPack line for GM transmissions. The first (Alto part no. 031757BHP, pictured above) covers GM 3L80, TH400, TH375, TH425 and TH475 transmissions, model years 1964 to 1995. The second (Alto part no. 031757CHP, pictured below) covers GM 4L80E and 4L85E transmissions, model years 1990 and

Alto introduces steel plate for GM transmissions

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

Alto-Steel-Plates-1400