DIY automatic transmission Toyota repair

In detail: automatic transmission Toyota do-it-yourself repair from a real master for the site my.housecope.com.

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.

Video (click to play).

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.

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 Toyota Camry automatic transmission 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.

On modern Toyota Carolla models (the latest generation), a mechanical transmission with automatic control is installed - robotic. And the need to repair the Toyota automatic transmission arises much more often. The clutch control unit is broken.If the control electronics fails, the control unit begins to generate incorrect signals for disengaging and engaging the clutch. As a result, start-up shocks and towing occur. The main thing is to notice the problem in time, then it will not be difficult to fix it. The clutch control unit needs to be replaced or repaired. In case of late detection of the problem, it will be necessary to intervene in the mechanical part or replace the assembly.Since 2002, new gearboxes of the automatic transmission А750F have been installed on the Toyota Land Cruiser car, such a five-speed transmission, equipped with a large amount of electronics. Oil sludge and torque converter breakdowns often occur. This leads to mechanical damage. Well, to do the repair of the Toyota automatic transmission with your own hands or contact the service station specialists - the decision is for the car owner. Although qualified service technicians do not differentiate between car brands and models. Any work, let it be repairing the VAZ 2107 clutch or changing the Peugeot 206 oil, tinting the car windows or repairing the Toyota automatic transmission, will be done in good faith and on time.

Image - DIY Toyota automatic transmission

Before removing the gearbox, the oil does not need to be drained from it. However, then do not forget to substitute the container in the place where the oil supply pipes are attached when you disconnect them - otherwise you will get an ugly puddle under your feet.

All actions must be careful. Sudden movements can damage the splines on the input shaft of the diaphragm.

It is better to do automatic transmission repair with your own hands, having it at hand proprietary manual and a printed diagram of the gearbox. First you need to inspect all the systems that serve the gearbox, mounts and blocks. Then we proceed to the repair. For this:

We disassemble the gearbox, wash and dry the parts and check them for defects.
We change all gaskets, seals, as well as worn out parts.
Remove the inhibitor block and sump. We clean out the dirt inside. It looks like metal magnetic shavings.
We remove the wiring of the ring from the plug and push them inside the plug.
Remove the valve body, loosen the brake band bolts. We wash the valve body.
We check the clutches, gears and planetary gears for wear. We will replace it if there is such a need. All internal rubber bands must be changed!
We open the oil pump. We check all the details, especially the filter. We change what has already served its term. We use the manual so as not to swap parts.
We take out the valves and springs. We wash the valves. Their sticking can be the reason for incorrect operation of the automatic transmission. Replace the accumulator springs if they are broken.
Putting everything back into place. It is important not to confuse anything!
We replace rings and friction bolts.
We check the gear shift assembly and the large piston and put the oil pump in place.

Assembly takes place upside-down.

There are some points that it is advisable to take into account when repairing. Often a transmission problem is related to the filter. It will not be possible to change it without removing the valve body. And when it is removed, the gasket breaks. To replace it, you will need to disassemble the valve body completely. The same applies to the accumulator spring from first to second gear. A special stopper does not allow you to remove it without disassembling the valve body. All valve body gaskets are very similar, do not mix them up. Assembling the valve body, we tighten it with a torque wrench. It is important not to overtighten here.

If all the breakdowns are eliminated, we install the automatic transmission. The moment is responsible, haste is inappropriate here. During these works, the following recommendations should be adhered to:

When installing the automatic transmission in its place, the diaphragm is checked for end runout using an indicator head. If such a defect occurs, then it must be replaced.
The radiator is flushed until the gasoline is clean. Then a liter of transmission oil is poured into the gas turbine engine and put on the input shaft. You need to achieve a secure connection and a complete fit. Then you need to dock the engine with the box along the guide centering pins. The crankcases must abut completely.
Tightening the bolts in the box is the next step. After that, the absence of gaps along the entire plane is checked. After connecting all the lines, the correctness of the connections is checked.
At the final stage, oil is poured and the operation of the automatic transmission is checked at low engine speeds.

Beginning the installation of the box, be sure to check for the presence of centering pins on the crankcase flange - there should be two of them. If at least one is missing, the automatic transmission cannot be attached.

Automatic transmission repair and diagnostics do it yourself - not an easy but feasible task. Choosing a car with an automatic transmission, novice motorists believe that repairing it at home is impossible. This is not true. But before deciding to carry out such important work at home, you need to weigh all your possibilities. Then you will not be in for unpleasant surprises during the renovation.

It is quite problematic and time-consuming to repair an automatic transmission on a Toyota car. As a rule, repairs are carried out by experienced specialists in service centers and service stations. But you can do the work yourself if you follow the recommendations that are given in this article.First of all, dismantle all sensors and attachments, and then remove directly the gearbox itself, disconnecting it from the power unit. Then disassemble it by removing the following bolts:

2 bolts for 17,

4 bolts by 14;

7 bolts 12.

Also remove the bolts that secure the pan and filter. It is recommended to immediately check the state of the filter, most often it is dirty.

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Inspection of the filter can help you find out what exactly led to the failure of the automatic transmission. After dismantling the filter, a hydraulic logic block (also called brains) will open before the gaze, in which there are several valves responsible for pressure, switching and blocking.Remove the hydraulic block. To do this, first disconnect the electrical wires from the solenoids and 10 bolts on the headrest and then remove this element. After removing the bolts, slowly separate the plate. Remember to immediately remove the drain valve from the hydraulic clutch and the accumulator.Then remove the pump by screwing in the bolts. Screw in the bolts by hand until they stop and pull evenly with the socket head. Just don't overdo it, as damage can be done.Then follow these steps:

Loosen the 12 bolts securing the pan, which are located on the side. Remove the pan itself carefully, as small elements may fall out of it;

Get out the 4th speed package that raises the row and check the condition of the bearing washer. At the same time, act more carefully so that it does not fall, because from a large number of components of the automatic transmission you can forget exactly where the washer was located;

Disconnect the stoppers. This is quite problematic, so it is best to use a screwdriver, but be careful not to cause damage.

In most cases, when inspecting an automatic transmission, a damaged bushing is found, which leads to displacement of the shafts. In addition, here it is possible to identify what caused the bearings to rotate in the inner race. All broken components must be replaced with new elements.In the process of work, you need to be careful so that nothing falls inside the automatic transmission or on the floor.Fold all the removed components in order to make it easier to put the box back together, make sure that nothing is lost. Also, check for loose parts just in case.In some cases, when there are too many defective parts, it is better to buy another gearbox (you can install a supported one). After all, one cannot be completely sure that after the repair work the checkpoint will function properly.You can independently return this element to a working state. First of all DIY automatic transmission repair Toyota will save money that would have to be paid for the work of specialists.If you are not confident in your own abilities, it is recommended to contact a service station for help. There, workers will quickly put the gearbox in order and save you from unnecessary worries.But know that disassembly of automatic transmission toyota performed by specialists, it is far from always of high quality, since they often try to save money on some details.In general, all components of Toyota cars are reliable and can serve for a long time. The same applies to the automatic transmission. But after a certain period of time, it may require repair. Most often, the failure of this unit is caused by improper operation, frequent driving in difficult conditions or rare maintenance. Therefore, you should regularly check it for any faults.