The 4T65E transmission is a 4-speed transverse electronically controlled automatic transmission first manufactured for GM vehicles in 1997. The 4T65E transmission was featured in the Lumina, Impala, and Pontiac Grand Prix among other vehicles. The 4T transmission family is based on TH125 transmission design and later replaced by the 6-speed 6T70. See the full Raybestos Powertrain 4T65E transmission parts listing below.