Borg Warner Super T-10 4 Speed Transmission *** SOLD *** Borg Warner Super T-10 4 speed transmission, used in General Motors (GM) vehicles from 1975-1981. All aluminum case, with cast iron side cover, lightweight transmission, built as an improved design over the 1960s T-10 transmission, used as a replacement by GM for the Muncie M-20, M-21, M-22 transmissions. Originally removed from a 1978 ve...