Adjusting the governor weights and springs can be done to adjust the wide-open throttle shift points of the transmission. There are flyweights and springs on this spinning widget, and when the flyweights overcome the springs and hydraulic pressure, the flyweights push open a rod valve that lives in the center of the governor shaft. It is a little widget that spins with the output shaft. The governor lives behind a cap secured by a bail on the drivers side of the transmission in front of the tail cone. All stock TH350s were manufactured the same their differences in shift characteristics for specific engines and vehicles were set with the governor and modulator. The vacuum modulator, together with the governor, controls the shift points on the TH350 transmission.
