gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

A/T - Erratic or No Upshift (New Governor Driven Gear)|Page 3492 > < A/T - Erratic or No Upshift (New Governor Driven Gear)|Page 3490
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Governor: Description and Operation

The vehicle speed signal to the transmission is supplied by the governor which is driven by the output shaft he governor consists of flyweights and a
regulator valve. Centrifugal force of the flyweights is imposed on the regulator valve, causing it to regulate a pressure signal that increases with speed.

Governor pressure acts on the modulator valve to cause modulator pressure to decrease as vehicle speed increases. Generates a speed sensitive oil
pressure that increases with output shaft or vehicle speed. Governor pressure is used to control the shift points and modulator pressure regulation.

A/T - Erratic or No Upshift (New Governor Driven Gear)|Page 3492 > < A/T - Erratic or No Upshift (New Governor Driven Gear)|Page 3490