DIY Toyota a241l automatic transmission repair

Toyota automatic transmission repair is a very time-consuming and complicated process. This is usually done by experienced people in a service station or service center. However, after reading the article, it will become easier for you to repair an automatic transmission with your own hands.

The first place to start is to remove all sensors and attachments. After that, we begin to disassemble the automatic transmission box, that is, we remove two bolts for seventeen, four bolts for fourteen and seven pump bolts for twelve. Next in line is the removal of the pallet. Pay attention directly to the filter, it is usually dirty.

The filter is fixed with 3 screws. Having diagnosed the filter, you can tell a lot about the causes of the malfunction of the automatic transmission. After you have removed the filter, brains or hydraulic logic opens up in front of us, in which a blocking valve, a pressure valve, three switching valves are located.

Removing the hydraulic logic. To do this, we disconnect the electric solenoid chips and ten bolts on the head. We detach them and remove the brains. After removing the bolts, slowly separate the plate. Please note that you need to immediately remove the drain valve from the fluid coupling and the accumulator.

Once again we check that nothing falls and nothing is lost, that is, we check for loosening of some parts manually. Then we remove the pump by screwing in two bolts on the sides, the bolts, by the way, come from the starter.

We bring the bolts all the way and tighten them with the head, you do not need to use force, as it can be damaged. After doing these manipulations from the side, we loosen the two bolts by twelve that hold the pan. Then we take it out and immediately look for faults. Attention! Turn the saucepan over carefully, as small parts may fall out of it.

DIY Toyota automatic transmission repair must be very neat, so we arrange all the parts of the automatic transmission in order so that during assembly we do not get confused about what and where to attach. Then we take out the fourth speed package, which increases the row.

Next, we inspect the bearing washers, but be extremely careful with them, because they may fall, and you, from the abundance of parts in the automatic transmission, will not be able to guess that it was there. We disconnect the stopper, which can cause some difficulties, you can resort to using a screwdriver, but everything should be done very carefully so as not to damage anything. Most often, when diagnosing automatic transmission, bushing wear is detected, due to which the shafts begin to walk.

Here you can also see what turned the bearings, that is, they turn them in the inner race. All defective parts should not only be found but also replaced.

Any repair with your own hands is quite profitable financially, since you do not need to give your hard-earned money to specialists. But, if you are not very confident in your abilities, contact the service station, where they will help you save some amount of time and wasted nerves. However, remember that any work done with your own hands is of higher quality, since you are unlikely to save money on your car.

In 1985, the Japanese company Aisin introduced a new Automatic transmission A140, which is part of a series of four-speed automatic transmissions installed on Toyota cars. The transmission was intended for vehicles with engine displacement up to 2 liters. The gearbox was installed on Toyota Corolla, Celica, Rav 4 and Corolla.

The use of a special torque converter made it possible to install this modification of four-speed automatic transmissions on vehicles with an increased engine power rating. The gearbox has proven itself as unkillable and super reliable transmission. The first breakdowns are characteristic of the aging of the unit and they appear only on runs after 300,000 kilometers. One of the features of this gearbox modification is that there is no need to change the oil. Only when carrying out a major overhaul, the need for which arises with runs of more than 300,000 kilometers, is it recommended to change the oil. At the same time, the car owner must closely monitor the condition of the gaskets in the valve body, since if they are damaged, oil can actively leak through the leaky gaskets, which leads to oil starvation of the gearbox.

Of the breakdowns, one can single out only the wear of the clutches, which can begin at high mileage. To eliminate this breakdown, it is necessary to use special repair kits that allow you to completely restore the unit's performance. Also, when carrying out a major overhaul, it is necessary to change all gaskets, the oil filter and the oil itself. Any difficulty in performing repair of automatic transmission A140 and there is no modification. Therefore, you can easily carry out all the repair work yourself.

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Alexander Kosachev

If it is from the hatch at the junction of the box and the engine, then the torque converter oil seal. There is nothing else in that place.
You can take it down. Two more and with a winch.
Hypothetically, it can still be on the bolts tightening the automatic transmission case.

Dust, shavings - it doesn't matter. The box must be completely disassembled, everything must be washed, the condition of the clutch packs, and the executive hydraulic cylinders must be observed. Most likely, clutches, bearings and gaskets for diffusion, filter and oil seals for replacement.

We believe that it is cheaper: to find such a box still alive (which is on the verge of unreal) or to repair your own.

A240 series of 4-speed automatic transmission (A240 - 245, A246E, A247E ... ) has been successfully working since 1985 on the legendary in its reliability Corolla, capturing the adjacent classes - Corona, RAV4 and Celica with a volume of up to 2 liters. Without significant modifications to the indestructible Corolla, the RAV4 is still equipped with the indestructible A246.

This family also includes a higher torque A140-th series of automatic transmission. A140E was installed from 1983 to 2004 on more powerful Camry (Celica. below) from 2L Japanese and American assembly.

At the same time, a slightly more "complex" and expensive box was released - A540, for even more powerful Camry and Lexus engines.

Predecessors, 3-stage A130, 131, 132L installed from 1983 to 2001 - on Corolla and Tersely up to 1.8L.

The first modifications A240L, A241E, A243L, A244 with two solenoids in a simple valve body began to be installed in 1985.

The A240 design was updated in 1993 when new modifications came to replace A245 - A246 - 247 with modern valve body and solenoids. In addition to the valve body, the A245-247 received a new filter (331010C) and new clutches with steel discs. Previous machines of the A240-244 series continued to be widely installed on Corollas around the world until 2008. The difference between related models - in different versions of clutches for the most loaded Direct and Forward packages, the hydraulic plate was constantly improving due to problems with shifting 4-3, the design of the planetary gear was changing, etc.

The current generation of this proven family A245E / A246E / 247E has been published since 2003. Modification A247E slightly reinforced on the “iron” to withstand more torque from the 2-liter engines. In 2003, the valve body was again updated, which received a linear main pressure solenoid (EPC - 331431) and, accordingly, a 331010G filter with a pan, a significant upgrade of the computer and control system.

After running in 2004, the solenoid-electric regulator was slightly changed - 331431DE.

Despite its simplicity and low price, this family of 4-speed automatic transmissions is inferior in popularity to its more “advanced” Aisin's brother from the “U” series - U140 - U240... Competitors of this box can be considered non-German ZF4HP16 - 4HP18, which rather compete with U240, and 4 Jatko mortars: RE4F03 - RE4F04.

This is perhaps the most reliable family of 4AT machines in the world, besides the legendary Toyota long-livers, it is also installed under the name AW70-40LE on the Chevrolet Prizm. But as 72-42LE or 73-41LS was installed on the Pontiac Vibe until the very end of the life of this automaker in 2009.

ATF oil up to 95 years old - mineral, Dexron-III class.

From 1995, Toyota gradually switched to the T-IV type, which was used until 2003-2005. Since 2005-2006, WS synthetics have been poured into Aisin boxes, which works better at low temperatures with solenoids and slipping clutches. For a complete oil change in all boxes of this series produced since 2003, it is recommended to use oil of the WS type. If you have a partial oil change, it is better to check the recommended oil for your car.

On all machines with a metal mesh filter, after 5-7 years of operation, it is recommended to embed an external fine post-treatment filter with a felt membrane into the oil line, which protects the valve body from the adhesive layer of the clutches in the event that the owner has brought their wear to metal. The main filter - No. 100019 on older cars is recommended to be changed annually before winter to control the degree of contamination and the presence of steel crumbs on the filter magnet.

Most of all, this machine is afraid of wear on the torque converter clutch lock-up clutch, which contaminates the solenoids and valve body.

Pick up repair kits - press the button on the left.

These machines pass very long distances without repair, but after 200 tkm, you should monitor the pump oil seal leaks and repair the torque converter - 331001 in time.

Repair kits for gaskets and oil seals for all series А240 and А140 - assembled under numbers No. 331002. Repair kits are different for different series and years of manufacture, which is usually indicated in the description. Timely replacement of consumables gives this indestructible machine another couple of hundred thousand km without overhaul. The resource of these machines is limited only by the life of the car itself, and there are known cases of automatic transmission repairs of a car with a mileage of over a million km.

Modifications A240 from 1988 to 2003 had a similar configuration Whale overwolf - (331002A), and after 2003, the designers decided on deunification.

The choice of OverolKit Repair Kits for this family is perhaps the widest. Most often, craftsmen choose the quality between Transtec and Precision - No. 331002.

Conventional overhauled boxes are quite old and come with a clutch blocking clutch worn out to glue, with which the remaining clutches are impregnated. Therefore, it is recommended to replace the entire set of friction discs during the bulkhead. Friction discs are assembled in complete sets for different series A140 and A240 - No. 331003.

All that is needed for trouble-free operation is to change the oil on time and (in 8-10 years) filter.

It is also recommended to replace the filter if the box was operated with burnt oil or with a bald clutch of the torque converter.

Filters for A140 on eternal Camry from 1989 331010A are most often found in repair.

Filters for the A240-243L since 1990 (331010B).

Filters for A140 are available in different modifications 331010 for the intake opening - until 1989.

For modifications А245-247Е the valve body was changed and since 1993 the filter has changed 331010C - (on right).

The oil is used T-IV, approx. 7.3 liters for a full shift and 3 liters for a partial one.

Since 2003, the hydraulic plate has been further improved by adding an EPC linear solenoid (SLT) and a filter for A245E / A246E / 247E changed again 331010G (left).

Steel mesh filter. The new settings put much more stress on the torque converter and the oil can burn and become contaminated with glue from the lock-up clutch much faster.

The oils for each of the boxes were selected individually. If in 1993 the unpretentious D-II was used, then later, with the advent of slip blocking of the gas turbine clutch, they switched to ATF Toyota T-IV.

From time to time or due to wear of the torque converter lockup and the resulting vibrations, oil seals (pump, axle shafts, etc., cuffs) 340070 begin to leak. Together with them, the gear selector shaft oil seal 331072 is changed. If tightened with replacement of oil seals, you have to change the pump rotating sleeve 330034.

If you tighten up with this repair, then you have to change the entire pump - No. 331500 or its cover - No. 331510.

Axle oil seals are of two types: an outer diameter of 54 mm (since 1983) and 55 mm (since 1984),

There is a difference in the seals of the left semiaxis for A245 and A247 (left) 331076 .

All of these oil seals are included in the Overol Kit and are individually taken by experienced craftsmen when the car came with only one complaint: a leaking oil seal.

Of the packages in this family of transmissions, the most loaded Direct and Forward clutch packages are burning typical for non-kill ones (the clutch numbers for A140 and A240 are different)

The brake band 331022 has a fairly large resource, the design of which has not changed since 1985.

Change due to old age or when the friction pad is impregnated with burnt oil.

Solenoids have the same great resource. Changing Solenoid Electric Linear Pressure Regulator SLT - # 331431 - Diagnostics requires special equipment.

Solenoids are changed quite rarely in old age cars as they age and the resource is depleted. Electrovalve solenoids 331425 and 331425 are checked by resistance test and pressure applied by the compressor.

Overhauls in services in most cases consist in repairing the torque converter, valve body, box bulkhead and changing consumables and burnt clutches.

The first to fail from the packages are: - Package clutches Forward / Direct HEG 83+ [40Tx1.7 × 126] 331108

paired with - Steel disc, Forward / Direct 83+ [8Tx1.8 × 105] 331128.

The statistics on these boxes are poor, partly due to the fact that the boxes of this family are distinguished by enviable health and unpretentiousness and rarely come for overhaul, and partly due to the fact that overhaul of an old Toyota machine in the service is a relatively expensive pleasure. Many owners forget about the torque converter and kill this unique box to the end, bringing matters to the point of replacing it with an easily accessible control box.

You can check the cost and availability of positions for overhaul of this automatic transmission family in the online store by clicking on the number on an orange background to search for a part.

Aisin is the main supplier and manufacturer of automatic transmissions for foreign vehicles, and is part of the Japanese Toyota Group. All products of such a company are considered the most durable and reliable, manufactured in accordance with the strictest quality standards. Nowadays, you can still find a car produced in the 80s, on which four and three-speed automatic transmissions are still successfully operated by the Aisin Company.

You cannot meet a car enthusiast who does not know about the famous Toyota car, the rating of this car takes a leading place. This is explained by the unsurpassed skill and quality work of Japanese masters. Toyota owes its reliability to the excellent quality of components and assemblies and a high level of control over the quality of assembly.

For a long time, the Toyota concern acquired from Aisin the classic and simplest models, which remained in their arsenal for a long time, while constantly being modernized. Some of the most popular, durable and reliable gearboxes are A140, A340, A40. They work great, are distinguished by their durability, but this does not mean that they will not need repair.

Repair of a Toyota automatic gearbox, in this case, is not difficult when compared with the repair of modern electronic boxes.

In a Toyota car, a problem with the mechanical part may occur, the clutches are destroyed and the planetary gear may suffer. Such breakdowns are caused in most cases due to improper operation of the vehicle.One of the common reasons for a malfunction of the A40 automatic transmission is a broken wire that controls the solenoid. The task of the wizard is to splice the wire.

Automatic transmission А 140 - repair of the Toyota automatic transmission is required in case of mechanical damage to the differential and due to a violation of friction pairs. Such troubles happen through the fault of the driver, you need to be more careful. Gearboxes of the A 140 (130) series have separate lubrication systems: the main differential and the automatic machine itself are provided with separate lubrication. The car owner, after draining the oil from both drain holes, often forget to refill both systems. Or they can pour it into the machine and the differential, which is lubricated with viscous conventional gear oil. As a result, oil starvation occurs, and it becomes necessary to repair the box.

Repair of automatic transmission Toyota Camry and other models

Automatic transmission Toyota U 140 b RAV 4. The one hundred and fortieth series of the transmission belongs to the classic model. The hydraulic and mechanical part of such a box is distinguished by its reliability. But sometimes the electronic unit breaks down. As a result, incorrect signals are sent to the hydraulic blocks, which lead to serious hydraulic and mechanical problems. It is necessary to replace the electronic unit.

Automatic transmissions of the U140 series with electronic control have an important feature - the breakdown protection system. The principle of this system: as a result of slipping, the box stops switching, before that it goes into emergency mode. In this case, starting-off is possible only from higher gears.

One of the most reliable and popular cars on the market is Toyota Carolla, this car always takes the leading place .. Automatic transmission is also one of the best. Automatic transmission U341F has a classic design, it is a four-speed automatic transmission. Such a design is considered not to be killed, it will work for a long time, the main thing is to properly operate and change filters and working fluid in a timely manner. Therefore, the repair of the automatic transmission of this model, as well as the repair of the Toyota Camry automatic transmission, is not required very often. With this box, only one accident can happen - the hydraulic plate will break, in this case, the repair of the Toyota automatic box consists in replacing the solenoid block.