An automatic transmission valve body is a major component of a vehicle's automatic transmission system and directs pressurized transmission fluid to a network of valves that engage appropriate clutch packs for smooth gear shifting. These valves use pressure as hydraulic signals to determine which gear set, also called band servo, to select when the vehicle changes speed.Know More
The valves inside the transmission valve body receive pressurized hydraulic fluid from the hydraulic pump, called the governor, to drive clutch and brake actuators for optimal band servo ratio. The most important of these valves is the manual valve. It is directly connected to the gear stick handle and instructs which passages should allow hydraulic fluid to pass through.
Modern automatic transmission systems incorporate sensors that monitor car speed, throttle position, brake pedal position and engine load to control how soft or firm the gear shift must be. The sensors send vital data to the onboard engine management computer, which directs electrically controlled solenoids that redirect hydraulic fluid to the correct clutch pack.
The incorporation of these sensors has made self-diagnostics possible on modern transmission systems. A malfunctioning transmission part is detected early by the engine management computer which, in turn, alerts drivers by activating a warning light on the vehicle's dashboard.Learn more about Transmission
Some of the signs that a transmission is bad include slipping in and out of gear, problems accelerating, odors in the transmission fluid and transmission fluid leaks. Once a transmission starts going bad, these signs typically give a car owner time to have repairs done before the transmission goes out completely, so it's important not to ignore them.Full Answer >
The transmission fluid should be replaced on a regular basis. Regardless of having a manual or automatic transmission fluid, regularly changing it will avoid costly transmission repairs.Full Answer >
A slipping transmission is frequently caused by a problem with the vehicle's transmission fluid. Additionally, important components of the transmission, particularly the bands, may be worn or broken. Transmission slippage can also be instigated by clutch malfunction in both automatic and standard vehicles.Full Answer >
To change the transmission fluid in a Chrysler, loosen the transmission pan, allow the fluid to drain into an approved container, and remove and replace the gasket and filter housed in the transmission pan. Replace the pan, and fill the car with the recommended amount of transmission fluid.Full Answer >