Do-it-yourself Volvo automatic transmission valve body repair

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

During operation, the valve body on automatic transmissions is subjected to significant stress. That is why, in case of improper operation or poor-quality maintenance, the valve body may fail and require expensive repairs. Depending on the design of the gearbox and the location of the engine, the valve body is installed either in an easily accessible way or not.

Content :

Damage to the valve body of an automatic transmission can occur as a result of improper operation of the transmission. So, for example, a car owner can not wait for the transmission fluid to warm up in the winter season and start driving in the most active mode. In some cases, problems with the cooling system are noted, which arise as a result of the lack of replacement of the coolant and improper operation of the oil receiver. All this can lead to damage to the valve body and the gearbox itself.

Damage can be accompanied by various symptoms of the valve body. It should be noted that, despite the development of computer systems for diagnosing cars, it is difficult to accurately determine the breakdown of this element. Therefore, when carrying out service work, the foremen can determine the breakdown only by dismantling the box.

Valve body automatic transmission principle of operation simple enough. It transmits through certain channels the fluid pressure (ATF) to the mechanical parts of the automatic transmission, it all depends on the required action, and on which gear the engagement falls into. All this complex process is controlled by an ECU (Electronic Control Unit). It must be said that due to the increased loads, this element does not differ in the required reliability and has a higher percentage of breakdowns than the entire automatic transmission as a whole.

Video (click to play).

Characteristic a sign of a malfunction of the automatic transmission valve body there are increased vibrations and grinding noise when changing gears. In some cases, there may be a complete stop of the engine when the selector moves from Parking modes to Drive mode. Also, quite often, a malfunction manifests itself in jolts, bumps and slippage between gears. Modern cars equipped with multiple sensors display a transmission damage message in the event of breakdowns. It is possible to determine the exact cause of the breakdown only by connecting the computer to the diagnostic equipment and conducting the appropriate transmission tests. In this case, you can install the failed element. However, it is impossible to say exactly the nature of the breakdown even after the computer diagnostics has been carried out. It is necessary to dismantle the valve body and disassemble it.

The valve body can be repaired in specialized workshops and service centers. Do-it-yourself automatic transmission valve body repair is possible only if you have practical experience with such spare parts. You will need to dismantle (in some cases) the automatic transmission, open the case and check the valves first. You most likely will not be able to clear them on your own, because professional equipment is used for this. Also, be sure to check the valve body springs, which tend to wear. Reassembling the valve body structure is of great importance, if you make a mistake - the consequences can be much sadder than replacing only one complete part. As you can see, only an experienced specialist can carry out repair work if he has the appropriate equipment.

Valve body diagram

The cost of valve body repair directly depends on the nature of the breakdown. So, for example, problems with springs, valves, solenoid block are quite often noted. In many car services, they do not undertake repairs, citing the fact that it will be cheaper to replace it in the assembly. This is not always the case, you can contact us and we will be happy to repair the valve body inexpensively and efficiently. Due to the fact that the valve body design is quite complex, consisting of a large number of parts, it takes a huge amount of knowledge and experience to carry out such a repair. The cost of such repairs can range from 10,000 rubles to several tens of thousands of rubles. There is also the problem of a clogged valve body when the valve plate spools begin to stick. In some cases, it makes sense to replace a broken element, and not try to carry out an expensive and complex restoration procedure.

Of the preventive measures to prevent damage to the valve body, we recommend that you closely monitor the condition of the automatic transmission cooling system. It is the improper operation of the cooling system that is one of the most common causes of damage to this element.

Also, the car owner should properly operate his car and the automatic transmission in particular. You should not, especially in the winter season, start driving the car without preheating the oil in the gearbox. This procedure takes only a few minutes and allows you to easily bring the oil temperature in the gearbox and valve body to the required temperature. Thus, you can ensure high-quality cooling and lubrication of the moving parts.

To warm up the transmission, you need to move the selector to the Drive (D) position and hold the brake for one minute. Immediately after that, you can start moving. It should also be remembered that after starting driving on a cold car, it is not recommended to spin the engine above 3000 rpm. By following these simple rules, you can protect the gearbox and valve body from damage and extend the trouble-free life of your vehicle.

Message laguna1 »07 Feb 2011, 20:03

Message motorsport »08 Feb 2011, 12:51

A unique case - desire finally coincided with the possibilities

p / s have you already done an oil change?

Message laguna1 »08 Feb 2011, 17:03

Message motorsport "08 Feb 2011, 17:22

Do not indulge yourself with illusions.
If only it was a matter of adjustment. This is not a Zhiguli that needs to be customized for yourself. Failure of solenoids is caused by wear, not misalignment.

It is, of course, more pleasant to solve the problem “until it reaches the Russian border” for 300 jerboas.
Service will not be bothered with such nonsense - too little exhaust and too much responsibility in case of a mistake. And the garage man won't.

Read also: DIY fashion repair

I don’t know, for example, I was interested in my box of how something could be repaired cheaply if something happened, but also disappointing - the solenoids are not repaired, and are so delicate in nature that it’s better not to touch with dirty fingers.

Message laguna1 »08 Feb 2011, 19:12

Repair of solenoids SLU, SLT, SLS.

Message laguna1 »08 Feb 2011, 19:30

Here's to you stupid Americans repairing solenoids SLU, SLT, SLS.

So send your repairmen yourself you know where. Specialists have proliferated ala "branded service all for replacement", and rich capitalists repair, there is no evil at them.

Message laguna1 » 15.10.2013 19:50

Message » 15.10.2013 20:45

I would advise you to change the whole package.
You don't have to adjust the gaps.

Message laguna1 » 15.10.2013 21:07

Message » 15.10.2013 21:20

laguna1, No, you're confused. One package burned out completely. The rest are whole. I said, maybe I'll change a couple more (packages).

The trick is that the clutches are new and old and in general from different manufacturers can have different thicknesses. Therefore, it makes sense to change the entire package.
Well, plus, after the repair, they expose the gaps in the package - free play. You don't need to expose anything on new parts.

Message laguna1 » 15.10.2013 21:41

Message Ultras » 15.10.2013 22:20

Message laguna1 » 15.10.2013 23:14

Message Ultras » 15.10.2013 23:23

Message laguna1 » 15.10.2013 23:56

Message laguna1 » 16.10.2013 13:04

Image - DIY Volvo automatic transmission valve body repair

There was such crap on the planetary (decent overheating).

Added after 10 minutes 27 seconds:

More overheating.

Added after 3 minutes 38 seconds:
I have a question about this bushing. It moves freely on the shaft.

Added after 2 minutes 15 seconds:
I have a question about the color blue. This is fine?

Added after 7 minutes 21 seconds:
Completely sintered clutch package here.

Automobile concern Volvo is originally from Sweden. In addition to cars, it is engaged in the production of buses, trucks, engines, various equipment and construction equipment. For its cars, Volvo uses automatic transmissions of well-known manufacturers, subjecting them to modifications for their own cars. Cars from Volvo are very reliable and durable, they are popularly called "tanks". Automatic transmissions used by Volvo are very reliable and durable by modern standards. The repair of these transmissions will not cause any difficulties - they are well studied by specialists in Russia.

The legendary A340 four-speed transmission from Aisin was installed on the Volvo XC90 cars. It has been used since 1985 for rear- and all-wheel drive vehicles with engine displacement up to four liters. This transmission was installed on Land Cruiser, Sequoia, Pickup, Terracan, Pajero, Mark2. This machine can rightfully be called one of the most "unkillable". With a timely oil change, this machine can also cover a million kilometers. And this is on powerful engines with huge torque and cars, which are usually not spared. After a number of modifications, this automatic transmission is still in use. And it is quite possible to find a car that rides on the very first batch of these boxes. They say about this automatic transmission that it experiences first the car, and then the driver. And she rarely needs repairs.

Repair kits for automatic transmission Volvo XC90 can be ordered aftermarket, they are of decent quality. Typically, XC90 transmissions go to overhaul without any problems. Or the driver, tired of waiting for the dying transmission, finally dies and himself arrives at the service and makes repairs.

A340 automatic transmission for Volvo XC90

For older XC90 cars, it is imperative to change the clutch kit, steel drums and brake band. For SUVs, a "masterkit" is produced, which contains everything you need if you need a major overhaul. Many elements can be ordered and reinforced. The tuned 340 can withstand engines boosted to 1000-2000 horsepower.

The XC90 automatic transmission filter is reusable with a metal mesh, they are changed during a major overhaul or if at least one clutch burned out.

On older XC90 vehicles, the torque converter is always worn out. Its abnormal operation destroys the pump, its oil seal and the XC90 automatic transmission bushing.

The kit for the XC90 automatic transmission includes bushings, gaskets and oil seals. They fail over time and begin to leak pressure. Sometimes they change plastic washers together.

The brake band on the XC90 automatic transmission must also be replaced, but sometimes they save money on it and, in principle, the box after such a "underrepair" completely reaches its well-deserved pension.

The electrical part is very reliable. Solenoids work out for fifteen years. For older cars, their replacement is shown. The solenoid valve and the pressure regulator rarely get tired.

The Volvo S60 and S80 are equipped with Aisin six-speed automatic transmissions AW55-50SN. This transmission is suitable for front wheel drive vehicles with engines up to four liters. The transmission was tested in 2000 on Voldo S60 and S80 vehicles. This transmission is found in cars Daewoo, Chevrolet, Opel, Cadillac, Fiat, Nissan, Renault.

This automatic transmission is designed taking into account new technologies and trends in the production of automatic transmissions.Compared to previous generations of automatic transmission, it has significantly improved the dynamic characteristics, comfort and environmental friendliness of the car.

The S60 and S80 automatic transmissions use linear solenoids for smoother gear shifting, with virtually no power loss. The second innovation is the torque converter lock-up slip mode and the manufacture of the torque converter clutch from stronger graphite materials. The lock-up of the torque converter in the S60 and S80 automatic transmissions is activated already from second gear, which increases the wear of the torque converter clutch, but increases the acceleration characteristics.

Automatic transmission AW55-50SN for Volvo S60 and S80

The automatic transmission filter S60 and S80 are of two types, with or without an edge. With an edge it has the best characteristics, but they are not interchangeable; The filling of the filter is different for different modifications. Maybe felt and metal mesh. After 2004, Toyota WS oil is suitable for this box and nothing else. The settings of the solenoids of the S60 and S80 automatic transmissions are too precise and they are designed specifically for this oil.

Repair kits can be taken not original, they are produced of sufficient quality.

In the early years of the transmission, the main problem was the ingress of antifreeze into the transmission fluid. Fortunately, this deficiency has been eliminated and now such repairs are not required. The first modifications of the valve body were not very reliable, but since 2004 they have been produced quite durable.

There were no more particular problems with this transmission.

The new slip mode has a negative impact on the oil life. It quickly becomes contaminated with the degradation products of the torque converter friction lining. In turn, dirty oil contaminates the valve body, clogs the channels of the solenoids, valves and the plate itself. The plungers of the S60 and S80 automatic transmissions get stuck in the mud and the oil stops reaching the clutch packs, which leads to their burnout. This is the reason for most of the premature repairs (up to 200,000 kilometers) is automatic transmission.Volvo S60 with automatic transmission AW55-50SNThe main symptom of S60 and S80 transmission problems is shifting between second and third gear. They start to lag or occur with a shock. The brake band can suffer from shifting shock.Repair of valve bodies of five- and six-speed automatic transmissions is rarely done. This is an absolutely unprofitable activity, and it can be very, very difficult to find a specialist. The only thing that is done is cleaning the valve body and replacing the solenoids. In other cases, this is the replacement of the valve body.Among the popular replacements for the S60 and S80 automatic transmissions is the repair of the pump oil seal and pump cover sleeve. Typically, these problems follow right after driving a worn converter when a major overhaul is being done. If the torque converter is not repaired, then it makes no sense to eliminate such a problem. It is worth repairing the torque converter at every major overhaul, since it is its friction lining that is the main reason for the problems and breakdowns of this automatic transmission. Oil starvation from a hydraulic block clogged with debris affects the bushings, they begin to leak oil and the rest of the gearbox mechanisms are already suffering from this.Torque converter, automatic transmission AW55-50SN for Volvo S60 and S80When overhauling an adult car, all clutches, steel discs and brake bands must be changed. They also suffer from dirty oil and torque converter clutch wear.From electrics to automatic transmissions S60 and S80, solenoids and a speed sensor are often changed.In terms of hardware, the box is very reliable. For extreme riders, a rear planetary gear set and some drums are sometimes ordered. Teflon rings and seats wear out on drums. Sometimes the problem is exacerbated by tired brake band. A consequence of these problems can be sun gear teeth breaking.For age automatic transmissions of this model, the installation of an external fine filter is shown, which will significantly increase the life of the box.The latest modifications of these boxes, with a quiet ride and timely oil and filter changes, practically do not break. But an aggressive and inattentive driver can drive them less than 150,000 kilometers.Volvo XC70 cars are equipped with Aisin's TF80SC six-speed transmissions. Works in tandem with engines of up to 4 liters for front-wheel drive vehicles. This transmission is actively used in many car brands: Ford, Mazda, Fiat, Peugeot, Opel, Renault, Citroen, Saab and others.TF80SC automatic transmission on Volvo XC70The history of this machine in Volvo cars began in 2001. Aisin engineers set themselves the task of making the most technologically advanced and modern transmission. They have increased acceleration, fuel efficiency and shift comfort. At the same time, the development remained at the level of "unkillable" Toyota automatic transmissions. And all this was managed to fit into the engine compartment, taking up a place the size of a manual transmission. Almost one hundred percent efficiency, smoothness and economy made this transmission a direct competitor to robotic gearboxes. Surpassing them in comfort and reliability. The Volvo XC70 transmission has practically brought hydraulic transmissions back to the market by making them competitive again. It is literally a masterpiece of engineering.DO NOT SPEND MONEY ON REPAINING!
Now you yourself can remove any scratch from the body of your car in just 5 seconds.The Volvo XC70 electronic control unit will not allow the driver to overload or overheat the box. Many elements and mechanisms of the Volvo XC70 automatic transmission are made of modern materials and have a huge resource.The diseases of this automatic transmission are not associated with its design features. They usually arise from the clumsy implementation of the customer's engineers into their cars and incorrect settings. So, they are different for each car model. Some cars with this automatic transmission are very reliable, some are not very reliable.Volvo XC70 with automatic transmission TF80SCThe main headache for Volvo XC70 owners is torque converter wear. And this is normal for five- and six-speed automatic transmissions. The Volvo XC70 automatic transmission uses a friction lining and this is the only non-modern solution. Other manufacturers have been using bearings for a long time.Sometimes the owners of Volvo XC70 are faced with the failure of the clutches of the forward gear. The box is very sensitive to burnt and dirty oil. When exposed to dirty oil on the automatic transmission, for some time it is worth paying attention to the condition of the valve body, solenoids, clutches, bushings. In terms of hardware, this automatic transmission is very reliable.Modern transmissions are very complex and if they fail, it can be very difficult to figure out what the matter is without the help of professionals. And such a decision may not save money, but only make it worse.

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.