To control the operation of the gearbox, an electromechanical unit is. Depending on the automaker, the box may have the designation AF21 - Ford, AW6A-EL - Mazda. The automatic transmission TF-81SC was developed by Aisin Warner in 2003, as a modification of the TF-80SC for engines with a volume from 2 to 4 liters, and a torque of up to 450 Nm.Seal, TF-80SC Axle (Case Side) 2nd Generation. Urgent orders are fulfilled within 1-2 working days (if ordered before 12 noon) Express shipments cost from 36 to 120 euros, depending on the weight of. Delivery time 5-7 working days. The goods are shipped directly from the warehouse in the Netherlands. All parts from this catalog can be ordered.
That is why the transmission is quite space effective – its length is a mere 358 mm. The unit is intended for front-wheel and all-wheel drive vehicles with an east-west engine mounting. Solenoid, TF-80SC/AF40, Linear, C3 (SS3/SLC3) Blue Conn.The Japanese company Aisin AW created the TF-80SC almost 15 years ago. Https 192168361Because the front planetary gearset is always rotating around the stationary sun gear, this type of transmission never achievesRight (Saab, Opel) TF-80SC at the best online prices at , Free shipping for many products,Find many great new & used options and get the best deals for.Some manufacturers used a special labelling for this transmission – AF21 (TF-81SC) for Ford and AF40-6 (TF-80SC) for Ford and GM, AM6 for Peugeot and Citroen, AW6A-EL for Mazda. The Lepelletier geartrain can be identified by the stationary sun gear in the input planetary gearset (figure 2). To get six speeds, this transmis-sion uses the Lepelletier geartrain. These transmissions work with engines from 1.9 to 4.4 L, the torque limitation being 450 Nm.(AW6A-EL) and Volvo (TF-80SC). This transmission designed for the transfer of quite a high torque is installed in models of various vehicle classes – С (OpelAstra, Chevrolet Cruze), Е (Volvo S80), as well as CUVs (Mazda CX-7 and CX-9) and minivans, or multi-purpose vehicles (Renault Espace). And in most cases the problem is associated with transmission overheat and infrequent oil change.As a result of the modernization, the torque converter got equipped with additional shock absorbing springs. 1, 2) with a 2.2 L diesel.The main source of trouble for a TF-81SC owner is usually the torque converter and the valve body. We are going to have a look at the transmission of Land Rover Freelander 2 (Fig. As a result, some of the “congenital” disorders and failures have been eliminated. Duty roster excel formatIt mostly occurs in transmissions working with diesel engines – such engines tend to develop a high torque even at low rpm. This does not happen often, and the cause of that is overload. It still has to be replaced, but less frequently than before.Sometimes the one-way clutch bearing falls apart (Fig. And although in modern transmissions this problem has been eliminated, the friction plate still wears intensively – yet, now the wear is uniform. Due to such deformity, the friction material got worn unevenly (Fig. The strengthening of the surface reduces the strain and alteration of the form of the bottom, which was often the case in the first generation of torque converters. ![]() On the other hand, when making long trips without harsh speeding up, the oil will serve several times longer.For oil change, the original transmission fluids Aisin AW – AW-1 or Toyota WS are recommended. In case of regular commutes in a big city with all its horrendous traffic, or when driving aggressively (with slam acceleration and abrupt braking), it is possible to turn the fluid into unusable dregs in 10 thousand km. Of course, in the TCM there is a protection mode which, when reaching a temperature of 129 C, in most cases blocks the torque converter, but it is better not to bring the transmission to a state for emergency modes.The frequency of oil changes depends on the operating mode and working conditions. 16 you can see fresh oil, used – but still usable oil, and waste oil which should have been changed long ago.A transmission with fresh fluid is less prone to overheating – new oil carries away heat better. The fact is that this gearbox is very sensitive to the fluid characteristics, therefore I recommend to change oil every 20–30 thousand km.The oil gets dirty, and it is clearly seen by its color: in Fig. However, under our conditions, an oil change at least once a year or two will considerably reduce the chance of failures. However, it has to be borne in mind that valve bodies for different vehicle models are different too.In transmissions designed before 2010 there were a lot of problems connected with components wear. Timely oil change helps to keep the filter relatively clean and makes it possible to buy some time before the filter change becomes inevitable.After being modernized, the valve body changed completely – you can see the difference, as they say, with the naked eye (Fig. 6, 24, at your discretion) is arranged in such a way that to replace it you need to dismantle the transmission and partially disassemble it. 17), excessive wear of the valve body case, as well as the lock-up valve itself is possible. In the middle part of the valve body where the torque converter lock-up valve is located (Fig. Yet, the engineers did not manage to tackle all the problems. ![]() 19 – Pressure-regulating valve with increasing mode pressure-regulating valve with decreasing mode (in the same place)Just like the lock-up valve, the pressure regulators are also prone to wear (Fig. However, the wear of the working surfaces deteriorates the operability of both.Fig. In a valve body, two valve types are used: the first one raises the pressure at increased current intensity, the other one does the exact opposite. Sometimes this is caused by a failure of the transmission ECU software.Incidentally, in some not infrequent cases a reflashing (or update) of the TCM eliminates some of the problems.Faulty solenoids can easily be identified by means of diagnostic trouble codes (Fig. The root of the problem can be the electromagnetic valve or the plungers. In the new version of the TF-81SC, there is only one modulation valve there used to be two in the previous versions: one was activated at a pressure decline, the other – at a pressure increase. The jerks can be observed in a non-faulty transmission too, if it hasn’t warmed up yet, but there aren’t supposed to be any jerks in a warmed-up transmission even if you stomp on the accelerator really hard.A sure sign of valve problems is the increase in the jerks frequency and intensity at steeply increasing rpm, with no jerks at smooth acceleration.If you can feel the jerks constantly and at any speed, the cause can be in the mechanical part – the wear or damage of the rubber, teflon, and rubber-metal seals or pistons.This defect can also be associated with the modulation valve in the valve body. When applying to a car-service centre, customers complain of: jerks and slipping when shifting gears during slam acceleration or braking. Eventually, the driver feels a somewhat slurred and indistinct or, on the contrary, too sharp and violent engagement of some gears. Tf 80Sc Professional Approach ToWhen making your choice, please, make sure that the software version you are purchasing supports adaptation. I strongly recommend using original equipment from renowned manufacturers and special software for diagnostics and adaptation procedures after repair. It is necessary to adopt a professional approach to diagnostics, as well as use high-quality spare parts and sometimes very costly equipment. And eventually the client will return to you – or will turn to another car service centre. The valve body cleaning is capable of eliminating some of the symptoms for a short period of time, but it won’t solve the problem.
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