This tank transmission cutaway is in the Sloan museum in Flint.
Four views of the M18 "Hellcat" tank being built at Buick during World War II in factory #62. The larger "Sherman" tank was built at Grand Blanc Michigan just south of Flint. Tank production also went on at the Fisher #1 plant. The Hellcat used a radial aircraft engine for it's power, The transmission was completely built at Buick Flint.