This method is just to drain the 3 litres out of the 7 litres total capacity.
Looking at the Mechanics Guide and alternatively talking to some of the transmission specialists, it appears there are two completely different methods for changing the fluid on the autobox.Ī/ Mechanics Guide Method (Guessing Citroen Dealer Method)
So overall, Changing the fluid every two years or so is probably a very good idea for anyone planning on keeping the car beyond a couple of years.Ī link to anyone with a curiosity as to the internals - Click Here. If there are real problems in the box, this will be obvious from the fluid condition. Plus the crucial viscosity/friction characteristics of the fluid will be back to spec. Advantages of changing the oil include reducing the debris particle count which will reduce the solenoid valve wear problems. Assuming a double change (ie two partial changes of 3 litres each time), the fluid cost itself is reasonable at about £70. However, a fluid change is a straightforward operation and for the specialist I spoke to, they carry the special Aisin fluid at £11/ litre. The specialist has confirmed that the design does not allow for the internal filter to be changed without a complete dismantling of the transmission. A post has already been made on this forum re what could be causing transmission clonks. Wear in the solenoid valves manifests as worsening gear shifts, clunks in the transmission etc. These boxes are fitted to loads of Mazdas, Fords, Volvos, Peugeots, etc so the service and repair guys are starting to see the reality of the these boxes as they age. The spares importers down in Sussex are busy supplying these spares to the overhaul shops. Talking to a reputable Automatic Transmission Specialist, these boxes are subject to significant wear problems for the internal solenoid valves, caused by wear debris. OK, Citroen's take on the routine servicing for the Aisin TF-80 (SC) transmission is that it is sealed for life, no specified servicing requirements.
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