Copyright by Goodheart-Willcox Co., Inc.
After studying this chapter, you will be able to:
Explain how transmission oil pumps develop hydraulic pressure.
Describe the purpose of the transmission oil filter.
State the two locations of transmission oil coolers.
Explain the purpose and design of valve bodies and control valves.
Describe the operation of the manual valve and related linkage.
Explain the two ways of operating throttle valves.
Describe the types of transmission governor valves.
Describe the operation of accumulators.
Explain the operation of the park lock mechanism.
Describe the purpose and operation of electrical switches.
Describe the purpose and operation of electrical solenoids.
185
Technical Terms
Chapter
9
Automatic
Transmission
Control
Components
Transmission oil pump
Front pump
Oil filter
Oil strainer
Main oil cooler
Auxiliary oil coolers
Valve body
Auxiliary valve bodies
Oil transfer tubes
Hydraulic valves
Pressure regulator valve
Line pressure
Accumulator
Shift linkage
Selector lever
Neutral start switch
Parking gear
Parking pawl
Shift-brake interlock
Switches
Solenoids
Detent solenoid
Lockup solenoid
Manual valve
Shift valves
Throttle valve
Throttle pressure
Throttle valve (TV) linkage
Vacuum modulator
Governor valve
Governor pressure
Detent valve
Passing gear
Check ball
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