"Transmissionnoe oil in an automatic transmission is usually replaced through each 60 thousand in km." (From "Repair manuals and to maintenance service"). About for what, why as as, tell the master of firm "Automatic Transmission Group".

Automatic transmission, established on Ford Scorpio, has no drain aperture. Plums transemission liquids it is carried out too much the pallet at its removal. Take care of suitable capacity.
Technicians - the people serious, as well as the goddess of the Technician to whom they worship. The technics does not suffer discrepancy, or, God forbid, any jokes. It is extremely exact in everything, including language, that is terminology. It is told "the gate", means, "gate" and "shabrits". And if, on the contrary, it is written: "to dissolve", there is no place to disappear - it is necessary to plant...










About terminology

Conversation on it has come not casually. From the point of view of the terminology, the phrase of "Management" resulted by us "does not hold out" a little. Smells slightly, excuse, technical.

And business consists in the following. In automatic transmissions fill in at all oil, and liquid specially developed for these purposes for automatic transmissions that proves to be true English-speaking abbreviation ATF (automatic transmission fluid), always present on packing of the given product.

It would seem, what difference - oil or a liquid? On the contrary. The difference is, and essential. In the technician it is accepted to name oil the substance used first of all for greasing of rubbing surfaces of details and mechanisms. Unlike it, applied in transemission the liquid carries out set of other functions, to oil at all the unusual. And it works in other-wordly for motor and transemissions oils conditions. Here about it also we will talk.

For what?

Basic difference of automatic transmissions from mechanical is that at car movement between cranked shaft of the engine and primary shaft transemission there is no rigid communication. The role of known coupling here is assigned by all to device already known to us - the hydrodynamic transformer. It carries out transfer of a twisting moment from the engine to a box. The main character, i.e. a working body, is АTF.

Besides it ATF it is used for transfer of operating pressure upon friction clutches of multidisk couplings, causing inclusion of this or that transfer.

In the course of work knots and mechanisms transemission test serious thermal loadings. The temperature on a surface of friction clutches at the moment of transfer switching reaches 300-4000 S.Proishodit intensive heating of the hydrotransformer. At driving in a total power mode its temperature can reach 1500 With.

Maintenance of a heat-conducting path from transemission and heat dump in atmosphere occur also with the help transemission liquids.

Besides, ATF should still, without being oxidised at high temperatures and without foaming, to provide greasing wool mechanisms, bearings and the other details subject friction and formation. For this purpose in a liquid add the whole complex of additives. And to show the properties to the full it should in all range of admissible working temperatures: from-40 to +1500 With.

One I peep prepares, one erases, one children brings up... Hard!

And you speak: oil...

Why?

Chemists-technologists have wonderfully well tried, creating "an artful" liquid, but nevertheless could not provide such resource of its work yet that at car operation it would be possible to forget about existence ATF.

To that there are some reasons.

First, even if automatic transmission is tight and has no leaks, at operation the quantity of a liquid decreases owing to carrying out of its steams through system of ventilation of cavities automatic transemission, supplied with the valve - "droper". Therefore at maintenance service it is necessary to add  transemission a liquid to operational level

This procedure to execute simply if transemission has a tube for control of level of a liquid with щупом. Many modern transemission are not equipped. It is especially characteristic for the European manufacturers, persistently trying to discharge the inept automobile owner (and those at them, probably, the majority) of service of personal technics. Secondly, at long operation transemissions the liquid loses sooner or later the physical and chemical properties so necessary for it for execution of numerous useful functions. Owing to evaporation of easy fractions there is an increase in its viscosity above admissible level. Develop the resource miracle additives.

The transmissionnaja liquid during all term of operation in normally working box should remain pure. Little change of its colour is supposed only - it darkens.

The dirty black liquid with a specific smell of burning - an indicator of that is necessary to a box not liquid replacement, and serious repair.

Experts recommend to change oil after run by the car of 50-70 thousand in km if the car is maintained in a usual mode, and through 30-40 thousand in km - at very intensive ("police") driving. Once again pay attention that the indication to liquid replacement is not its colour, but only size of run of the car. If, of course, transemission it is serviceable.

The recommended mark transemissions usually is underlined to a liquid in manual on repair and technical service the car. If this information is inaccessible, it is useful to know the following. Despite a variety of trade marks, that is necessary for you, always has on packing an abbreviation "ATF". The Most often meeting mark ATF Р Dexron (usually with the Roman figures I, II or III). The more the figure, the above quality of a liquid also is more modern an automatic box in which it is used. For cars of mark of Ford it is recommended to use liquid Dexron-Mercon. These liquids, as well as the overwhelming majority available now on sale, are made on a mineral basis and have red colour. All of them, as a rule, are compatible with each other.

As usual, the French manufacturers developing for some cars ATF of yellow and green colours try to be original. To mix them with liquids native to us of red colour insistently it is not recommended, and that it will come to no good...

Recently in the market has appeared ATF on a synthetic basis (Synthetic ATF). The accompanying engineering specifications assert that "synthetics" provides good fluidity at temperatures to-480 With, the best stability at high temperatures and the increased term of operation. Thus synthetic transemissions the liquid is completely compatible with mineral ATF (besides unlike synthetic engine oil).

Cost of one litre of "synthetics" - about 10 US dollars while the litre mineral ATF costs 3-4 dollars.

To recommend it to application "anywhere" we will not risk. This business, as they say, a head and a purse. If synthetics use is especially stipulated "by the Management..." (For example, for transemission type 5HP30 with which some marks of cars of BMW), here business sacred are equipped - it is necessary to go on heavy expenses.

In total in transemission various types can refuel from 7 to 15 litres трансмиссионной liquids. However it at all does not mean that for replacement it is necessary for you to get such mad quantity ATF. Here basic difference of process of replacement of a liquid from engine oil change in the engine is shown.

The matter is that at replacement ATF you will manage to merge no more than 50 % from total amount. Yours dexterity and ability at anything - these are design features transemission. Completely to change transemissions a liquid it is possible only at full dismantling of a box. Before to go to shop, attentively study engineering specifications. Sometimes in it full volume ATF, sometimes the volume which is subject to replacement is underlined. Do not forget to get a new filtering element also.

How?

To merge transemissions liquid it is necessary from heated-up  transemissionfor what before сливом it is necessary to pass on the car of tens - another of kilometres.

Take care of safety measures: the liquid temperature can be very high. As a rule, for plum provide a drain stopper, but...

... Today, probably, not our day. To us has not carried. More truly, has not carried to master Michael Guljutkinu efficiently arranged on a chair under car: the box of mark А4LD by which the car of Ford Scorpio is equipped, has no drain stopper. Have really forgotten? The reasonable assumption that it not forgetfulness, and protection against the fool has been come out: you want to merge - turn off the pallet. You will turn off - you will see the filter.

In some designs transemission, for example, on cars Mercedes, possibility plum transemissions liquids not only from the pallet, but also from the hydrotransformer through a carving cap is provided.

Having removed the pallet, do not hasten to wash out it. At first look, whether is not present on its internal surface of the extraneous adjournment testifying to mechanical deterioration of details transemission. Presence of insignificant quantity of a metal dust on the catching magnet placed in a corner of the pallet is supposed only.

At service of separate types transemission, having opened the pallet, you will not find out a filtering element. Do not worry - happens and so. For example, in a box of mark AW50-40 LE established on Opel Vectra, the filter it is located so that can be replaced only at box major repairs.

Mounting a new filtering element, do not forget to establish all linings and the sealing rings entering into the complete set of the filter.

After refuelling of demanded quantity ATF, establish the selector of modes transemission in demanded for check of level of a liquid position and check up it at the working engine.

Having made a short-term trip, repeat measurement and finish level to norm. Examine the pallet about absence of leaks.