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     Most of the basic design characteristics in the T-10 were carried over successfully to the new Muncie transmission. Externally, the T-10 differs from the Muncie in that the T-10 used a cast iron main case, tail housing, side cover, and bearing retainer with Borg-Warner casting numbers, while the Muncie four-speed was an all-aluminum unit. Although the Muncie had its own weak points, one of which was the aluminum
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main case, the transmission was improved greatly over time. Eventually, the Muncie four-speed was used in all high performance applications in Corvettes and most Chevrolet passenger car applications until the Borg-Warner Second Design Super T-10 began replacing it in 1974. Follow along as we take a step back in automotive history and examine one of the greatest transmissions ever built.
Typical 1968 Muncie four-speed transmission, passenger side view

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Typical 1968 Muncie four-speed transmission, driver side view