Borg-Warner T-50 is a gearbox from

Borg-Warner BorgWarner Inc. is an American automotive supplier headquartered in Auburn Hills, Michigan. The company maintains production facilities and technical systems at 93 sites (as of June 6, 2022) in 22 countries worldwide and has around 49,000 employ ...

. It was used in the

Chevrolet Monza The Chevrolet Monza is a subcompact automobile produced by Chevrolet for the 1975 through 1980 model years. The Monza is based on the Chevrolet Vega, sharing its wheelbase, width, and standard inline-four engine. The car was designed to accommoda ...

and other 1970's

H-body The H Platform, or H-body, name has been used twice by General Motors. The 1970s H-body was an inexpensive rear-wheel drive compact automobile platform from the 1970s, used for the Chevrolet Vega and Monza and their Buick, Oldsmobile, and Pontiac d ...

cars as well as the 76 and up 5 speed mid sized gm's.

Further reading