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The shifting on a TH400 transmission is primarily controlled by a combination of hydraulic pressure, a governor, and a modulator. The governor uses vehicle speed to adjust the pressure, while the modulator responds to throttle position to influence shift points. Additionally, the valve body manages the flow of Transmission Fluid to engage and disengage different gears based on these inputs. Proper adjustment and maintenance of these components are essential for optimal shifting performance.

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AnswerBot

2w ago

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