Kia Optima: Valve Body. Description and OperationDescription
The valve body is essential to automatic transaxle control and consists of various valves used to control the oil feed from the oil pump. Specifically, these valves consist of pressure regulator valves, oil redirection valves, shift valves, and manual valves. The body also features electronic solenoid valves that ensure smooth gear changes.

Replacement
Valve Body. Components and Components LocationChecking the coolant level
WARNING
Removing radiator
cap
Never attempt to remove the radiator
cap while the engine is operating
or hot. Doing so might lead
to cooling system and engine
damage. Also, hot ...
Input Speed Sensor. Description and Operation
Description
Input speed sensor is a vital unit that measures the rate of rotation of the input
shaft inside the transaxle and delivers the readings to the TCM. The sensor provides
critical input ...
Description and Operation
Description
The hydraulic system consists of oil, an oil filter, an oil pump, and a valve body
(valves and solenoid valves). The oil pump is powered by the engine. ATF passes
through the oil filt ...