Classic Cars 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

The evolution of transmissions

The easiest thing to say would be: The manual transmission was first and the automatic came second. End of article. Well, that’s true… sort of.