DIY Hyundai automatic transmission repair

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

At the end of the last century, the Korean car manufacturer Hyundai was producing cars that were not popular enough. Only a complete modernization of production and expansion of the model range allowed to significantly increase the sales and popularity of the brand. Today, cars from this South Korean manufacturer are equipped with fuel-efficient engines and state-of-the-art automatic transmissions. The latter are made both independently and are purchased under license from leading Japanese manufacturers.

Automatic transmission repair Hyundai i30 - fast and inexpensive

A total of about a dozen different modifications of gearboxes are offered to buyers. The compact five-speed gearboxes, which are installed on Hyundai urban subcompact cars, are popular. These automatic transmissions combine smooth running and excellent reliability at the same time. The latter is achieved by simplifying the design and minimizing the use of automation. Such automatic transmissions require repairs in rare cases. It should be noted that such work to troubleshoot the operation of this unit should be carried out by professional specialists. An experienced technician will be able to quickly identify the breakdown, and, having opened the gearbox, will eliminate it at minimal cost. Therefore, we do not recommend that you repair the Hyundai automatic transmission yourself. When carrying out repair work on your own, you will invariably face a number of problems that can only be eliminated by an experienced specialist.

Video (click to play).

An automatic transmission is an expensive component. There is no point in delaying the repair if it starts to work incorrectly. In a car service, such repairs are expensive. You have to pay for the work of specialists and for the details. Having studied the market and the price range of services in this segment, motorists come to the conclusion that repairing automatic transmissions with their own hands is not such a pointless undertaking. The prices of the workshop masters cannot be called modest, and the professionalism does not always correspond to the price. And, after some thought, motorists can decide to fix the problem on their own.

Wherever you decide to repair the gearbox, the whole process goes according to the following scheme:

diagnostics,
dismantling the box,
disassembly of the box,
complete set with spare parts,
assembly (installation),
installation on a car,
diagnostics after repair.

To fix the problem yourself, you will need some car mechanic skills, tools, time to work, patience, and perseverance.

All automatic transmissions are arranged the same, but there are two types of transmission control - hydraulic and electronic. Their renovation has some differences.

It is important to notice transmission problems at the earliest possible stage. Then, with the correct diagnosis, complex repairs can be avoided. Quiet and smooth operation of the automatic transmission is considered normal. There are a lot of signs that something is wrong with the box. Most often these are extraneous sounds when changing gears or during robotic transmission. It can be crunching, clicks. An unpleasant smell also speaks of problems. It can appear during long-term or short-term operation of the box. It is worse if the gear shifting slows down, or one of them does not work at all. Then immediate intervention is required.

Do not be lazy to look under the car, it should be clean there. Red spots will indicate an oil leak from the transmission.Checking the oil level regularly is a must. Normally, it should be translucent, reddish in color. No burning smells or muddy shades! If they appear, it's time to change the oil.

Automatic transmission malfunctions often arise due to improper operation. The transmission becomes unusable due to insufficient oil level or overheating. For this reason, the gears wear out, the machine can jerk when changing gears. As a result, any part of the automatic transmission may fail. Shocks while driving indicate overheating of the oil and the appearance of problems in the valve body.

Aggressive driving with hard acceleration and braking will erase details. Does not add durability to the box and driving in traffic jams, slipping. All this leads to overheating of the box and has a bad effect on its general condition.

All faults are divided into two subgroups. They can occur in

electronic control system,
mechanical and hydraulic parts of the gearbox.

If a malfunction occurs, the automatic transmission goes into emergency mode, that is, it goes into third speed and does not switch. The corresponding icon appears on the display.

If problems have arisen with the electronics, then it will not be possible to fix them by repairing the automatic transmission. Therefore, it is important to understand the nature of the faults.

In diagnostics, the main thing is to collect the necessary information and interpret it correctly. Therefore, it is better to consult a specialist. Determine what the problem is at the service station, and take care of the repair yourself. Without proper experience and equipment, you will spend a lot of time on diagnostics. There are mechanical and computer diagnostics.

General scheme of diagnostic procedures:

check the oil,
check the operation of the engine at idle speed, the connection points of the wiring and cables,
determine the error codes of the operation of the control units (CU) of the gearbox and engine,
check the box on a car without movement,
check the automatic transmission in motion,
check the pressure inside the control system.

If the cause of the malfunctions is electronics problems, then most likely you will not need to dismantle and disassemble the automatic transmission. Diagnostics of malfunctions in this system is carried out by the control unit. It monitors the sensor signals, the transmission ratio and the resistance of the output circuits. Malfunctions of such parts and assemblies may occur:

input sensors,
electronic control unit,
executive devices of the control system,
violation of the integrity of the electrical wiring connections.

The transmission computer receives signals from various sensors. If some parameters are out of order, it writes the code of this problem (DTC) into memory. You can decrypt such numbers using a special scanner.

These are the main problems of the automatic transmission itself. They are conventionally divided into three subgroups:

Damage to friction groups, bushings and housings, calipers, planetary gear sets, pump and other mechanics.
Defective transformer. This includes:
- breaks in the splines of the wires,
- mechanical destruction of the blades,
- overrunning clutch,
- wear of the main blocking clutch,
- depressurization of the piston oil seal.
- Problems with the mechanics of the hydraulic plate.

If the diagnostics were successful and you cannot do without dismantling, then we proceed to this stage of the automatic transmission repair.

You will need a special lift, or at least a viewing hole. As well as a transmission jack and a set of keys. It is better to perform this procedure in a specially equipped garage or box. It will not be superfluous to invite several physically strong guys to help you move the removed box. Its weight is beyond the strength of even a very strong person. Further action plan:

disconnect all communication tubes and cables;
unscrew the torque converter mounting bolts, as well as the motor flywheel membranes;
remove and move the gearbox;
assess the scale of the breakdown and start repairing.

Image - DIY Hyundai automatic transmission repair

Before removing the gearbox, the oil does not need to be drained from it. However, then do not forget to substitute the container at 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 highways, 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.

The normal functioning of the gearbox is the key to a comfortable and safe ride on the vehicle. At the same time, for one reason or another, it may happen that the device fails.It's not worth pulling here, you need to immediately start restoring the system.

The repair process is quite complicated, but with the proper desire and skill, you can do it yourself. We will talk now about how the brake band adjustment of the Hyundai Accent automatic transmission is done, as well as other necessary actions.

As a rule, replacing the differential bearings of the automatic transmission Accent, as well as performing other repair work, is necessary in the event of:

natural development of the resource;
mechanical damage;

Video on how to adjust the brake band of the Hyundai Accent automatic transmission:

You can understand that the seals of the automatic transmission Accent, or any other elements, are out of order, by the following symptoms:

the vehicle slips;

one of the gears does not work;

oil leaks;

noise comes from the box;

strong shocks are felt when shifting gears, etc.

You have found a breakdown in the automatic transmission of your car. If you want to carry out repairs yourself, two a4af3 manuals will be very useful (especially if they are in Russian). The first is necessary to remove the gearbox, and the second is required when disassembling the box.

It will greatly simplify the process of diagnosing the error codes - this will help to identify the problem more specifically.

The Japanese automatic transmission demonstrates quite good indicators of maintainability, at the same time, here you need to be very careful when performing such work.

First, you need to acquire the necessary tools. From the equipment we need to take:

jack (3 pieces);
keys;
scrap;
a spudger and other tools;
several cups or other containers for different parts (they can be signed so as not to confuse anything).

In addition, you need to worry about a suitable box or garage - there is a lot of work to be done. Finally, we must not forget that, without a lot of experience, disassembling and repairing the valve body of the Hyundai Accent automatic transmission, as well as any other elements, is highly discouraged - otherwise it is highly likely that you will only harm the device.

First of all, we need to remove the automatic transmission Accent. As already mentioned, here it is necessary to follow the instructions exactly. The box and the motor are attached to the body with four supports, three of which are located on the machine. For the convenience of work, you can build a wooden structure, where the units can be hung on slings (in this case, it is better to make it sufficiently stable, since the equipment weighs not so little).

First, we start removing the wheels, then we mount the vehicle on stands. We first tear off the hub nuts. We ask the assistant to start the engine, and then press the brake. Using the L-shaped wrench, unscrew the nuts counterclockwise. Then we proceed to the drain plug of the crankcase, pour the oil into the container (if it has changed not so long ago, it will be possible to pour it back).

After that, unscrew the steering knuckle from the struts and remove the brake calipers (they are fixed with two bolts). If there are certain problems with the braking system, now it will be important to remove the pads. Next, the hub nuts are unscrewed, the fist is twisted, after which the outer CV joint is pushed inward to completely pull it out. Next, we proceed to remove the battery, the platform for it, as well as the air filter housing.

Having found the multifunction switch (namely, its connector), we proceed to remove the stop bracket of the switch limit switch. Here you need to apply a little pressure.

Next we see the RPM sensor. We unscrew the fixing bolt, disconnect the connector that transmits pulses for the band brake. Another sensor is located next to the wheel. Before we can pull it out, the mudguard needs to be dismantled.

There is an oil filler neck under the selector cable, which must be removed. Gently squeeze the coolant hose clamp, pry it off with a screwdriver.

Next, we are engaged in disconnecting the wiring, starter, speed sensors, unscrew the bolts that connect the motor housing and gearbox. After completing all these manipulations, the engine should be suspended from the lines.

We unscrew the donut from the flywheel, remove the supports. In fact, we removed the Hyundai Accent automatic transmission. It is worth remembering that the weight of the knot is quite large, so we do everything very carefully. It may be worth putting the boards underneath so that the unit falls on them and not on the concrete.

We removed the unit, now it is necessary to proceed with its actual repair. In principle, the assembly should be inspected immediately. Perhaps you will find significant deformations of the case, through which oil flows or other cracks. If not, it is necessary to disassemble the machine. Here you must adhere to a number of rules:

follow the instructions exactly, do not miss the nuances, because they can be quite important;
do everything very carefully. Items such as the f4a22 pulse generator are delicate enough to be easily damaged;
the instructions contain a large number of different equipment necessary for parsing the box. At the same time, it is replaced with a caliper or different bots. Here only the original puller is useful for disconnecting the oil pump;
if you are not confident in your abilities, you should entrust everything to the hands of professionals. The process of disassembling an automatic transmission is somewhat more complicated than removing this element.

We will not describe the process itself in detail, because there can be quite a lot of problems here, and the disassembly of the automatic transmission is described in detail in the instructions.

Automatic transmission Hyundai accent is a fairly reliable unit... With proper operation, it can normally serve up to 200 thousand km of run. At the same time, for one reason or another, the device may fail.

The process of removing and repairing a unit is quite complicated, it requires special equipment, premises, experience and detailed instructions. If anything from this list is missing, then you should contact the professionals - they will guarantee the reliable operation of the site in the future.

Next is a video on how to repair an automatic transmission Accent with your own hands:

Hyundai Elantra car

Hyundai Accent and Getz cars are equipped with A4AF-3 four-speed gearboxes. Hyundai produces its automatic transmissions independently, based on the developments of the Japanese concern Mitsubishi. This automatic transmission is produced for front-wheel drive cars of the middle class with an engine capacity of up to two liters.

To repair the automatic transmission, Hyundai Accent and Getz order cheap non-original repair kits for oil seals and gaskets. The automatic transmission filter Hyundai Accent and Getz is disposable, made of felt, must be replaced with each oil change or if any repairs have been made.

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If a trouble still happened and the box began to work in an abnormal mode or began to frighten with loud noise or jerks, then you should immediately go to the diagnosis. Driving on a faulty automatic transmission will only aggravate the situation, multiplying the already considerable amount of repairs.Repair of automatic transmission of a Hyundai car in a car serviceTo repair transmissions with your own hands, you will need a warm box with a lift or a pit, a comprehensive technical manual for the automatic transmission being repaired, a set of all the necessary tools, knowledge and experience. If at least one of these points is missing, then it is better to transfer this matter into the hands of experienced specialists. The prices for automatic transmission repairs are so high precisely because of the complexity of the work: removal and installation of the automatic transmission, for which you need to disassemble half of the car, diagnostics of the condition of the components and an electrician, and which can only be done by an experienced professional.

Repair of the Hyundai Accent automatic transmission at home and also changing the crown.

Automatic transmission repair F4A42 Hyundai Sonata.

Hyundai Elantra Complete oil change in AT

4-speed modern automatic transmission A4CF1 2005 and its more powerful version A4CF2 from Hyundai are designed for engines up to 2 liters. All subcompact front-wheel drive cars Hyundai (Accent, Solaris, Ceed, Getz.) And Kia (Spectra, Forte, Cerato, Soul.) Can be equipped with these automatic transmissions since 2006.

Change of the name system (departure from the Mitsubishi classification - F4A42) is likely to show independence from the Japanese partner that fell away in 2002 - the automatic transmission division Mitsubishi... This divorce showed that the Korean manufacturer had already “outgrown” its Japanese “teacher”. Both in terms of sales and experience, and no longer needs help designing new transmissions, leaving Mitsubishi out of work.

Design A4CF1 / 2 based on Japanese F4A42, but under the "budget" version of the car.

The first modification A4CF1 had quite a lot of "childhood" diseases, so in 2005 a slightly more enhanced modification was released A4CF2 ... Small changes in the electrical and computer settings in 2007 polished the design of this automatic transmission so that it could live comparable to the lifespan of the car itself.

At the same time, the A4CF1 itself also had settings that allowed it to live up to the cherished 200 tkm without serious problems.

And it even sometimes began to be installed on budget Hyundai I20, Elantra, Getz (only in Southeast Asia), and Kia decided to use this simple modification for Eastern European Ceed and Spectra, as well as American Forte. All this with 1.6l engines.

The main problems in the early years were oil and filter changes. Filter - combined fine cleaning with a felt membrane - No. 365010. Fits all A4CF models and 5-speed A5CF.

It is unpretentious to oil, but the valve body loves relatively clean oil without large solid particles. The presence of grains in the pallet larger than 1 mm is an indicator for the planned bulkhead of the machine.The smell of burnt oil is an indicator for an urgent bulkhead of the box with the replacement of all clutches. When rebuilding the machine, in addition to the filter, they usually order a set of gaskets (OverolKit), a set of clutches, bushings, solenoids and wiring for solenoids. The rest of the parts are sentenced to be replaced after dismantling and diagnostics.

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

Repair kit for gaskets and seals (OverolKit) # 365002 includes all necessary seals, rings and gaskets for a complete renewal.

Most often, ATOK repair kits are ordered, equally rarely - the more expensive Presision and Transtek.

It is recommended to change the clutches with a complete overhaul with the whole set (365003) together with a set of gaskets and oil seals, especially often if the box came into the bulkhead with burnt oil.

For a complete bulkhead, steel disks (365004) are ordered for the listed kits or immediately - Masterkit (more details) — 365007 .

A car for overhaul most often comes due to electrical problems and the combustion of oil and clutch packs caused by this. In this case, the torque converter is usually also worn out and requires replacement of consumables - (365001).

Typical problems A4CF2 -1

The most frequent object for overhaul is the valve body bulkhead, replacement of solenoids. The most intensely working solenoids live relatively shortly:

- line pressure VFS (EPC), A4CF1 / 2 2006-up 365431. Solenoid-electric PWM regulator. Learn more about solenoids.

The problem is associated with dirty and hot (due to the torque converter) oil and resource wear. The solenoid here is cheap in design, lasts 5-7 years and does not like dirty oil very much.

A separate C solenoid-solenoid valve, shift “C” 365421 is often ordered.

Before replacing the solenoids, you should first check the solenoid loop-wiring (below)

Also, the entire block of worn out solenoids-solenoids (5 pieces) in the hydraulic plate is often changed - No. 365420.

Often, electrical problems are caused by faulty solenoid wiring, A4CF2 (external with a connector), so it is better to start diagnostics of the box with it. The external wiring after running-in was modified in 2007, No. 354446.

- Intermediate wiring (internal), also replaced as a consumable: No. 365447.