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.so
Shall i give a go with atf flush+filter? Keep the same atf oil(which one it is actually??or shall i get the lfg8 in?? I am bit worried that something will go wrong with the tranny once new oil is put in as stated on some forums.
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I have the same quandary as you. My car is roughly the same mileage and does the owl hoot thing. It is also not the smoothest, gearchanges can be felt as jerks especially at low speeds.
There is a different fluid that can be put in but it requires a full flush with the new stuff - I think its called lifeguard 8 instead of 6 - then the gearbox needs a software update to deal with the different viscosity and friction coefficients of the different oil. As far as I'm aware the oil has been specially developed for high mileage gearboxes. There is a technical bulletin from Audi for the change.
I also believe that there arent many places that do the full flush - two names consistently come up, one in Glasgow and one in chester and it is very expensive due to the amount of fluid required (double the usual amount).
A question I have tried to get answered is whether a normal fluid and filter change with the same fluid as filled from the factory would restore the gearbox to the smooth slick gearbox it should be or whether it would wreck the box.
The consensus opinion is that maybe it would maybe it wouldnt! The fluid should be inspected first. If it is black and stinks, then there is a good chance that it is the particles of clutch friction material and tiny metallic particles floating around in the fluid that give it sufficient frictional properties to keep the gearbox working and changing for clean new stuff with a new filter will cause it to slip and basically finish it off.
If the oil has never been changed in 140k miles (like mine probably hasnt), its a gamble as to what will happen.
The other possibility; assuming a successful fluid and filter change (drop and clean pan, change filter, torque converter still full, refill with same type of oil) which improves the gearbox function, increases smoothness etc but on a gearbox that was hooting. A question Ive never managed to get an answer for is whether the hooting will still be there and will it further damage the gearbox or will it improve? What damage does the hooting actually do?
I have a good local autobox specialist who i would trust to do a full fluid change and fliter change. I can get the oil at a good price from my dad's work and I already have the filter, so I would just be paying for time. I'm going to take the car in and get some advice from them and see what they think. maybe get a sample taken of the oil to see what condition it is in.
Until I get the hot start problem sorted on this car though I dont want to spend much on it, certainly not the £600+ that I would be charged in glasgow. My A4 cabrio 3.0 tdi has the same gearbox but at only 30k miles. It is smooth as butter, you cant ever feel a gearchange and really is a joy. when you use the paddle shift the gearchanges are totally different, fast and sporty whereas on auto they are clutched in by the TCC giving smooth smooth changes.
Its a lot to think about. I'd be interested to see what you decide and how it work out for you of you go down the route of a standard oil and filter change. It sounds like your gearbox is hooting more often than mine. Mine tends to only really do it around third gear and on high loads, full throttle acceleration and changes going up very steep hills.
gill