When HPP teamed with GM Performance Parts (GMPP) and Classic Restorations to mate the new THM 4L85-E SuperMatic transmission to a built-to-the-hilt SD-455, we wanted to fully document the process ...

Ford and GM developed their current six-speed transmissions together and GM derived the eight-speed from that program.

Dealers will install a new transmission control module software free of charge and GM will provide a special coverage program for repairing transmissions identified as containing a defective ...

General Motors Co. plans to introduce 10 models with its new 9-speed transmission by the end of 2017, including four for its Chevrolet brand. The Detroit-based automaker is touting the ...