Symptoms of a torque Converter automatic transmission BMW, Subaru, "Mazda Premacy"

The torque Converter – this is one of the key elements in the automatic transmission. Due to it is carried out smooth and timely gear in the vehicle. First hydrotransportation system was developed in the early twentieth century, and today they are significantly upgraded. But despite all the improvements and technological advances, sometimes the box crashes. Let's consider the main symptoms of a torque Converter automatic transmission in the most popular models and brands of cars.

Working Principle of torque Converter

Technology is constantly evolving and, along with them becomes complicated and the design of the automatic transmission. Today the torque Converter in automatic transmissions is also assuming the function of the clutch. At the moment when one of the shows this system breaks the link between the engine and the transmission. After you enable step-down or step-up speed item selects the portion of the torque. This is necessary to ensure the most smooth switching.

Device

A Typical torque Converter consists of three rings with blades. All of these parts rotate, while they are located in a single package. Inside the last is transmission fluid. It lubricates and cools the moving parts in the transmission system. The torque Converter is mounted on the crankshaft and then is directly connected to the transmission mechanism. The liquid moves within the body with help of special pump – pump. This item allows you to create required for operation of the host oil pressure.

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Features of the modern GDT

Modern systems of automatic transmissions equipped with torque converters, which are fully controlled by electronics. A huge number of sensors monitors various parameters of the device. With all the technology, complexity of design is not the best way impact on reliability. Today, even on expensive and luxury car manufacturers can install the awkwardness of the box.

According to the theory, the torque Converter has a long lifetime. It is comparable with the resource of the entire automatic transmission. But sometimes, like any other mechanism, it can fail. The node must be repaired, but in some cases only replacement. You must know the symptoms of a torque Converter automatic transmission, in time to notice the problem and begin repairs. We will consider them.

The Main symptoms of torque Converter

The Owners of vehicles equipped with automatic transmissions, should know the basic symptoms of breakage. If in the process of switching can hear the soft mechanical sounds, and when revving and under load they disappear, then it tells about the problems in the bearings. The malfunction can be solved if the node to open and view them. Perhaps these parts should be replaced.

Also symptoms of a torque Converter automatic transmission – is the vibration. Especially often it occurs when driving at speeds in the range of 60-90 km/h as the deterioration of the situation of vibration will increase. It is often said that the working fluid has lost its properties, and its wear products are deposited in the oil filter and clogged it. The problem can be solved by changing the filter and oil in engine and automatic transmission.

If there are certain problems with the vehicle dynamics, it is not necessarily the torque Converter automatic transmission. Symptoms (photo of this is done in the article) in this case – no speakers, and the reason has to do with the failure of the overrunning clutch. If the vehicle is stopped and does not go anywhere else, then that also should be considered as one of the symptoms of problems in the automatic transmission. Often such behavior may indicate damage to the splines on the turbine wheel. The repair involves the installation of new slots or complete replacement of the entire turbine element.

If a routine motor distinctly heard rustling sounds, then this is also a symptom of a torque Converter automatic transmission. The problem lies in the bearing that is located between the turbine wheel and the cover. During the movement of the sound may intermittently appear or disappear. It is a signal for early treatment in service. Visit here to postpone it. If a gear heard loud noises, then deformed and fell out of the blade. The repair is easy and not too expensive. Specialists will replace the defective turbine wheel.

"Subaru"

The Owners of these vehicles rarely encounter the damage, the cause of which was the torque Converter automatic transmission. Symptoms "Subaru" virtually indistinguishable from symptoms of other transmission manufacturers. The most common symptoms – vibration and different noises when you work the box. Also in case of problems felt jerks during shifting at speeds of 60-70 km/h. the dynamics is Lost. It becomes very difficult to accelerate the car. Another symptom that is not associated with the torque Converter– the flow of the working fluid.

What most often fails on "Subaru"?

The Most common failure for these cars – a frictional pad of the piston lock. It wears out and fails. In this situation it is difficult to determine the damage. But if time does not diagnose the transmission, it just snaps. And then will only be replaced.

In the boxes of new generation (in six-speed automatic transmission), where the oil is in the working mode can reach 130 degrees, and the impeller to operate at the slip, there is another model failure. It's too quick wear of the friction linings. Its products contaminate the oil, clog the filter and the hydraulic unit. In the result of failure of a torque Converter automatic transmission. Symptoms here are the same as in the transmissions of other manufacturers.

BMW

Cars of this manufacturer has always distinguished reliability. But as in other models, there are nuances here. Some automatic transmission was just unfortunate and "stillborn". Also, many criticized the individual model components from ZF. Among the main causes of damage listed and the torque Converter automatic transmission. Symptoms – a box of twitching, there are attacks when switching in “D”, double-declutching when turning, slipping and vibration.

Serious signs of failure include the noises, jerks and “Muse” box. Perhaps the problem is not in the torque Converter. But his diagnosis will not be superfluous. Symptoms of a torque Converter automatic transmission “BMW” can be, and is not visible to the eye, but this does not mean that they are not. Often of the problems of transmission associated with various errors in the electronics. Here will help you diagnose the ECU.

«Mazda»

“Mazda Premacy” established popular transmissions 4F27E. Special problems with it no one. Its main advantage – excellent maintainability. Experts say that it can be repaired even without removing. Among the frequent faults – burn out the clutch in modes "Overdrive” and “Reverse”. Burns overrunning clutch.

All because of the design features of the automatic transmission. Torque Converter with no problems. In this box often wears out the hydraulic unit, damaged solenoids. Few of the owners had symptoms of a torque Converter automatic transmission. «Mazda Premacy” staffed reliable transmission.

A Fault automatic AL-4

It is a product of French engineers. This box was developed by the specialists of business concern Citroen. It was the main automatic transmission for all cars of French origin from 1998 to 2005. The unit turned out as simple as possible and maintainable. Though the box and does not have high smoothness, it has a good reliability. The owners rarely observe the symptoms of a torque Converter automatic transmission АЛ4.

Any special symptoms not here – they are standard for all hydrotransformer transmissions. Most importantly, what many fear in this box, it's the solenoids. They relatively often fail. There are also problems with the electronics. This box often in error and goes to emergency mode.

If the car is long operated in difficult conditions, sometimes the problems associated with the torque Converter. Cranks clutch is responsible for the free play of the reactor. This is manifested in the following way – the car is not moving at high speeds in Drive mode, and starts to move only when pressing the gas.

Summary

I must say that the specific signs that report on the failure of the torque Converter, no. Sometimes even experts can't determine what exactly has failed. All of this leads to costs of diagnosis. The repair is simple GDT. The difficulty only is to dismantle the site. In the process of repair is replacement of worn consumables, Assembly and balancing.