The Borg-Warner T-90 is a three-speed manual gearbox manufactured by Borg-Warner. It was used in most Willys and Kaiser-Jeep models from 1945 to 1971, as well as a number of International Harvester models. It is an improved version of the T-84 used in WWII Willys MB and Ford GPW military Jeeps. It was constructed with an iron case in both top-shift and side-shift variants. The gears are spur cut with only 2nd and 3rd gears synchronized.
The T-90A was used in Jeep models equipped with a four-cylinder engine.
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The T-90C is essentially a T-90A with a 3.339:1 first gear.
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The T-90J variant was used in six-cylinder models.
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