what does a valve body do in a transmission
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- The valve body is the control center of the automatic transmission. It contains a maze of channels and passages that direct hydraulic fluid to the numerous valves which then activate the appropriate clutch pack or band servo to smoothly shift to the appropriate gear for each driving situation. Planetary Gear Sets which are the mechanical systems that provide the various forward gear ratios as well as reverse. 2  The Hydraulic System which uses a special transmission fluid sent under pressure by an Oil Pump through the Valve Body to control the Clutches and the Bands in order to control the planetary gear sets.
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What does the Heater Core Valve do? The heater core valve acts much like a thermostat in that it regulates the amount of heat produced by the heater through the amount of fluid it allows to flow into the heater core. If not for the heater core valve, the vehicle's heater would be in a continuous state of warming.As the coolant flows through the heating system, the heat from the incoming coolant would radiate into the vehicle's passenger compartment.he heater core valve acts much like a thermostat in that it regulates the amount of heat produced by the heater through the amount of fluid it allows to flow into the heater core. If not for the heater core valve, the vehicle's heater would be in a continuous state of warming.
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- Your transmission shift solenoids mount on the transmission valve body that controls fluid flow through the various circuits and passages in the transmission.our transmission shift solenoids mount on the transmission valve body that controls fluid flow through the various circuits and passages in the transmission.
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Throttle Body Replacement Estimate for Chevrolet HHR The amount of air in the engine is controlled by the air intake system. A throttle body is part of the air intake system that helps control the amount of air that gets into the engine. If the throttle body fails, the engine will not get the proper mixture of air and fuel and the engine may lose power.
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- Usually a flat faced or roller companion to the camshaft that transfers the action of the camshaft to the rest of the valve train by sliding or rolling on the cam lobe. This is the maximum distance that the cam pushes the follower when the valve is open. This is different from valve lift.
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Transmission Flush, When and when not to flush transmission When the fluid leaves the transmission pump it passes to two different pressure regulators. One regulator supplies fluid at one pressure to the transmission itself that operates the pistons and controls gear shifting. The other is supplies the torque converter and the transmission cooler.
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What does the PCV valve do? This way, the PCV valve is very important for different aspects and helps car owners maintaining their car’s engines in shape as well as providing them with a good administration of the fuel economy. The PCV valve routes crankcase partially burned gases back to the engine.Once these gases go back to the engine, they are re-burned, allowing this way a better use and administration of fuel.ue to its tasks, the PCV valve is not only very useful but also implies important benefits. It completely eliminates crankcase emissions efficiently, avoiding that it becomes an air pollution factor. Besides, it also keeps the system free of moisture due to the constant air circulation that it implies.
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- Designed for vehicles that have been converted from drum to disc brakes, brake proportioning valves increase brake pressure to accommodate the upgrade.esigned for vehicles that have been converted from drum to disc brakes, brake proportioning valves increase brake pressure to accommodate the upgrade.
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Standard Suction Control Valve (SCV) Suits Isuzu, Mazda, Mitsubishi, Nissan, Toyota Product Description. All common rail engines use a suction control valve. The Suction Control Valve (SCV) is responsible for controlling fuel pressure in common rail engines. They move via a solenoid with each small incremental variation of the throttle.The Suction Control Valve uses extremely fine tolerances within their moving parts.i Spec Suction Control Valves will deliver more power over the standard unit by allowing the Common Rail Pump to make available more fuel for the ECU to control. NB, when using the Hi Spec Suction Control Valve a slight lumpy idle may be experienced.
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Valve seat Valve seats in exhibition. The valve seat in an internal combustion gasoline or diesel engine is the surface against which an intake or an exhaust valve rests during the portion of the engine operating cycle when that valve is closed. The valve seat is a critical component of an engine in that if it is improperly positioned, oriented, or formed during manufacture, valve leakage will occur which will adversely affect the engine compression ratio and therefore the engine efficiency, performance (power and torque ...
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Check valve A swing check valve or tilting disc check valve is a check valve in which the disc, the movable part to block the flow, swings on a hinge or trunnion, either onto the seat to block reverse flow or off the seat to allow forward flow.
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- The transmission solenoids are located under the side cover of the transmission. The side cover comes off with the transmission still in the car, but it's quite a job, especially if you don't have a lift.
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What does the modulator valve on a transmission do, and what are the symptoms if it is defective? HI I don't think its the transmission.. I think its the motor ... White smoke out the exhaust is water getting into the combustion chamber's. Means bad head gasket.. The Modulator valve is run by motor vacuum and controls the shift pattern of the transmission. If the motor is not running right it can effect the vacuum of the motor causing funny shift patterns. good luck tim
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Throttle Body Replacement Estimate for Chevrolet HHR The throttle body is a key part of the air intake system. It controls exactly how much air is allowed to enter the engine. When the throttle body malfunctions or breaks, the incorrect amount of air will enter the engine, and the engine will not run well.
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Transmission Solenoid: Function & Common Problems Transmission fluid is directed throughout the valve body by various transmission solenoids–such as the transmission shift solenoid, lockup solenoid, or transmission control solenoid (there’s also a torque converter clutch solenoid)–that either open or close hydraulic valves to regulate fluid flow.
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- The three-way valve remains actuated. The valve shifts, allowing air to flow through port A, ex-tending the cylinder.414B senses the back pressurecaused by the shifted valve, closes, and ex-hausts. Since the signal from valve #1 is blocked by the closed 414B, valve #2 (when actuated) shiftsthe control valve back.
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What does the PCV valve do? Posted by admin | Feb 5, 2017 | Auto maintenance | 0 |. The PCV valve is a control device which sends partially burned gases that come from the engine’s crankcase to the combustion chamber. Its name, PCV means Positive Crankcase Ventilation and is one of the oldest and most used emission control devices.
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- Envoy throttle body is like the carburetor on earlier cars except it does not supply fuel to the engine. Fuel is delivered by the fuel injectors at each cylinder. It's only fu … nction is to supply a regulated amount of air to the engine with a motor driven flapper valve.
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Get Your Transmission The valve body is the control center or brain of the automatic transmission. It contains a maze of channels and passages that direct hydraulic fluid to the various valves which then activate the appropriate clutch pack or band servo to smoothly shift to the appropriate gear for each driving situation.imply put, the valve body makes all of the shifting decisions for your transmission. Different inputs from various switches and sensors provide the valve body with the necessary information for the transmission to do it’s job properly.
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Valve Gear Valve Gear. 611 pages on this wiki. Valve gear is the mechanism on a steam locomotive that operates the inlet and exhaust valves to admit steam into the cylinder, and allow exhaust steam to escape, respectively, at the correct points in the cycle. It is sometimes referred to as the motion.
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- The modulator is attached to the outside of the transmission case and has a shaft which passes through the case and attaches to the throttle valve in the valve body. When an engine is under a light load or no load, high vacuum acts on the modulator which moves the throttle valve in one direction to allow the transmission to shift early and soft. As the engine load increases, vacuum is diminished which moves the valve in the other direction causing the transmission to shift later and more firmly.
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Transmission Fluid Exchange Good Or Bad Idea? Most transmission fluid exchange machines use a bladder type system to hold the new fluid (usually about 16 quarts), the old fluid flowing from the pump to the transmission cooler is interrupted and the equipment inserted into the loop. The old fluid supplies the hydraulic force to exchange the old fluid for the new. Sometimes they supplement the pressure with a low pressure pump. The new fluid is returned to the pan, where it flows through the filter first, then into the pump, valve body, etc.
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Transmission Solenoid: Function & Common Problems Transmission fluid is directed throughout the valve body by various transmission solenoids– such as the transmission shift solenoid, lockup solenoid, or transmission control solenoid (there’s also a torque converter clutch solenoid) –that either open or close hydraulic valves to regulate fluid flow.
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Valve guide A valve guide is a cylindrical piece of metal, pressed or integrally cast into the cylinder head, with the valve reciprocating inside it. Guides also serve to conduct heat from the combustion process out from the exhaust valve and into the cylinder head where it may be taken up by the cooling system.
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- The by-pass (relief) valve is an integral part of the lubrication system. By-pass valves are designed to allow oil flow to the engine components when the oil is cold, or if the filter becomes plugged. By-pass valves can be located in the lubricating system or in the lube filter. Under normal operating conditions, the by-pass valve will not be open. When the by-pass valve does open, the oil flows directly to the engine to prevent oil starvation and damage to the engine components. Each by-pass valve is set to open at a predetermined pressure differential. There are two conditions that will cause the by-pass valve to open: Engine Starts - When the engine is started and the oil is cold. Cold oil does not flow through the filter element as freely as when it is warm. This causes the pressure differential across the filter element to increase and the by-pass valve to open. The by-pass valve will close once the oil is warm and the pressure differential across the filter element drops below the by-pass valve pressure setting.
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How To Rebuild your Automatic Transmission Part I Place valve body manual lever in 'drive' position and place the valve body into the transmission case. Connect park lock rod to manual shift valve mechanism with e-clip. Torque valve body to spec and check shift shaft for binding.