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- Automatic Transmission Problems And Solutions Pdf
- Automatic transmission fluid
- Automatic transmission fluid
Automatic Transmission Problems And Solutions Pdf
Automatic transmission fluid ATF is a kind of transmission fluid used in vehicles with self-shifting or automatic transmissions. It is typically coloured red or green to distinguish it from motor oil and other fluids in the vehicle. The fluid is optimized  for the special requirements of a transmission, such as valve operation, brake band friction, and the torque converter, as well as gear lubrication.
ATF is also used as a hydraulic fluid in some power-assisted steering systems, as a lubricant in some 4WD transfer cases , and in some modern manual transmissions. Modern ATF consists of a base oil plus an additive package containing a wide variety of chemical compounds intended to provide the required properties of a particular ATF specification. Most ATFs contain some combination of additives that improve lubricating qualities,    such as anti-wear additives, rust and corrosion inhibitors, detergents, dispersants and surfactants which protect and clean metal surfaces ; kinematic viscosity and viscosity index improvers and modifiers, seal swell additives and agents which extend the rotational speed range and temperature range of the additives' application ; anti-foam additives and anti-oxidation compounds to inhibit oxidation and "boil-off"  which extends the life of the additives' application ; cold-flow improvers, high-temperature thickeners, gasket conditioners, pour point depressant and petroleum dye.
Note that the friction modifier only means that the fluid sticks to the surface of the metal a little more strongly, and therefore only helps to prevent early wear. It would be required for Ford, BorgWarner to prove that their transmissions are somehow harmed by friction modifiers.
In many countries, Ford have said that the modern Dex3 fluid is fine for the same transmissions that they say require the older standard. The vehicle's owner's manual will typically list the ATF specification s that are recommended by the manufacturer. Automatic transmission fluids have many performance-enhancing chemicals added to the fluid to meet the demands of each transmission. Some ATF specifications are open to competing brands, such as the common DEXRON specification, where different manufacturers use different chemicals to meet the same performance specification.
These products are sold under license from the OEM responsible for establishing the specification. Most ATF formulations are open 3rd party licensing, and certification by the automobile manufacturer. Each manufacturer has specific ATF requirements. Incorrect transmission fluid may result in transmission malfunction or severe damage, however this occurs where the viscosity is extremely different.
Synthetic ATF is available in modern OEM and aftermarket brands, offering better performance and service life for certain applications such as frequent trailer towing. The use of a lint-free white rag to wipe the dipstick on automatic transmissions is advised so that the color of the fluid can be checked. Dark brown or black ATF can be an indicator of a transmission problem, vehicle abuse, or fluid that has far exceeded its useful life.
Over-used ATF often has reduced lubrication properties and abrasive friction materials from clutches and brake bands suspended in it; failure to replace such fluid will accelerate transmission wear and could eventually ruin an otherwise healthy transmission.
However, color alone is not a completely reliable indication of the service life of ATF as most ATF products will darken with use. The manufacturer's recommended service interval is a more reliable measure of ATF life. In the absence of service or repair records, fluid color is a common means of gauging ATF service life. CVTs and dual-clutch transmissions often use specialized fluids. The history of automatic transmission fluids parallels the history of automatic transmission technology.
The world's first mass-produced automatic transmission, the Hydra-Matic 4-speed, was developed by General Motors GM for the model year. This transmission fluid was only available at Oldsmobile, Pontiac, and Cadillac dealerships.
Subsequent automatic transmission and fluid coupling technologies, and difficulties with fluids in cold and hot temperature extremes led to a need for longer lasting, higher quality transmission fluids.
Additionally, a better system of automatic transmission fluid distribution and marketing was necessary for the long term success of the automatic transmission. In , GM released a new Type "A" fluid specification. Every automatic transmission produced by any vehicle manufacturer used GM Type "A" transmission fluids in their transmissions from From many vehicle manufacturers continued to use the next GM automatic transmission fluid specification, the Type "A" Suffix "A" fluid in their transmissions.
In , Chrysler began releasing their own automatic transmission fluid specifications, see Mopar ATF for more information.
GM ATF was the same color as engine oil through Aftermarket ATF was available with red dye as an aid in fluid leak detection. In the s, s, s, and early s, ATF contained whale oil as a rust and corrosion inhibitor.
To provide a fluid that would be available to the general public for service fill, oil companies and other than factory fill suppliers were allowed to develop fluids meeting the ESW M2CF specification and market these fluids under their own brand names but identified as Type F. This fluid was developed to modify the vehicle shifting characteristics and to provide considerable improvement in the oxidation resistance and anti-wear performance.
With continuing changes and improvements in transmission design, a centrifugal lock-up torque converter clutch was introduced into the C5 transmission to smooth engine vibrations sensed by the occupant of the vehicle. The advent of Type H as factory fill necessitated the development of a service fluid specification to match the performance expected from Type H. One major revision occurred in September , when low-temperature viscosity requirements, volatility requirements, viscosity change limits after high-temperature exposure and improved oxidation limits were introduced.
Included are requirements to verify the anti-wear capabilities and anti-shudder characteristics of the fluid. In , Toyota began releasing their own automatic transmission fluid specifications, see Toyota ATF for more information. In , Ford produced the Type-F fluid specification. The Ford Car Shop Manual reads "The automatic transmission is filled at the factory with "lifetime" fluid.
Many other transmission manufacturers have followed with their own "Lifetime" automatic transmission fluids". To understand how a fluid can last a "lifetime", a study of the Chrysler Fluid Drive Fluid is helpful. The lesson learned by Chrysler with its fluid drives is applicable to modern automatic transmissions as well. This article described the fluid used in the Chrysler Fluid Drive and its subsequent revisions and enhancements through The fluid operates under almost ideal conditions in what is essentially a hermetically sealed case , the small amount of atmospheric oxygen initially present is removed by a harmless reaction with the fluid so as to leave a residual inert nitrogen atmosphere.
As a consequence, it has not been necessary to drain and replace the fluid, and the level-check recommendation has been successively extended from the original 2, miles to 15, miles and finally to "never" - or the life of the car.
Since drains and level checks were not only unnecessary but frequently harmful through the introduction of more air, and seal-destroying dirt Chrysler eventually left off the tempting level inspection plugs. This mechanism is, therefore, one of the very few that are actually lubricated for the life of the car. There are now myriad examples of couplings that have operated well over , miles without any attention whatsoever and were still in perfect condition when the car was retired.
Flushing or refilling the fluid on lifetime filled transmissions require to use equipment to fill from below, engaging the transmissions torque converter or using an external pump.
Any automatic transmission fluid will last longer if the transmission case could be hermetically sealed, but transmissions typically have two potential entry points for air:. Lifetime automatic transmission fluids made from higher quality base oil and an additive package are more chemically stable, less reactive, and do not experience oxidation as easily as lower quality fluids made from lower quality base oil and an additive package.
The definition of 'Lifetime Fluid" differs from transmission manufacturer to transmission manufacturer. Always consult the vehicle maintenance guide for the proper service interval for the fluid in your transmission and your driving conditions.
Chevrolet Colorado Example: According to the Scheduled Maintenance Guide of a Chevrolet Colorado with "Lifetime Fluid" could have two different fluid service intervals depending upon how the vehicle is driven: . Under "Normal" driving conditions, the automatic transmission fluid and filter never need to be changed. For over 70 years, the oil aftermarket has produced both licensed, and non-licensed, formulations of automatic transmission fluids ATF.
Non-licensed fluid is typically less expensive; these fluids are not regulated or endorsed by the vehicle manufacturer for use in their transmissions. Vehicle manufacturer approved and licensed fluids must have the license number printed on the product information label of the container or on the container housing.
Non-Licensed fluids do not show a license number. Make sure the fluid to be installed into a transmission matches the recommended fluid in the specifications section of the vehicle's owner's manual. ATF which has been mislabeled, has misleading labeling, or is fraudulently bottled as another product is an ongoing problem. Some of these fluids have led to multiple transmission failures. From Wikipedia, the free encyclopedia.
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Automatic transmission fluid
Lexus Automatic Transmission Fluid — type, capacity, instruction Information about type and capacity fluid are for reference only. I just used a suction pump almost 4qts of trans fluid out of the wifes RX XXXXX he also said … read more. Find specifications for every Lexus RX: gas mileage, engine, performance, warranty, equipment and more. Visit our store. Viscosity: SAE 75W If it is just for replacement, this procedure will be sufficient.
Automatic transmission fluid ATF is a kind of transmission fluid used in vehicles with self-shifting or automatic transmissions. It is typically coloured red or green to distinguish it from motor oil and other fluids in the vehicle. The fluid is optimized  for the special requirements of a transmission, such as valve operation, brake band friction, and the torque converter, as well as gear lubrication. ATF is also used as a hydraulic fluid in some power-assisted steering systems, as a lubricant in some 4WD transfer cases , and in some modern manual transmissions. Modern ATF consists of a base oil plus an additive package containing a wide variety of chemical compounds intended to provide the required properties of a particular ATF specification. Most ATFs contain some combination of additives that improve lubricating qualities,    such as anti-wear additives, rust and corrosion inhibitors, detergents, dispersants and surfactants which protect and clean metal surfaces ; kinematic viscosity and viscosity index improvers and modifiers, seal swell additives and agents which extend the rotational speed range and temperature range of the additives' application ; anti-foam additives and anti-oxidation compounds to inhibit oxidation and "boil-off"  which extends the life of the additives' application ; cold-flow improvers, high-temperature thickeners, gasket conditioners, pour point depressant and petroleum dye.
Automatic transmission fluid
Audi Transmission Code Location as he asked to see the codes. See full list on audiworld. The tag in the trunk looks pretty similar. The "megatronic" transmission control module has to be replaced. Select your model, trim and engine.
Aisin 09g. Box: Onehunga, Auckland What I have read and been told by customers about the valve body is not as detailed as we would want it to be. Feb 1, - So I had the dreaded P error code for a long time.
As a single compact package, it minimizes external piping abd eliminates a drive shaft. Find your perfect car with Edmunds expert reviews, car comparisons, and pricing tools. The rotating drum of this embodiment is a clutch drum forming part of a clutch 12 assembled in the automatic transmission. Automobile transmissions are provided that contain an automatic transmission fluid containing the new antifoam compositions.
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