Transmission Fluid change

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Audi A5 Sportback 8T 1.8 TFSI 2014

I had a transmission fluid change as suggested in the maintenance, done at an authorised dealer. However, at least two times, in cold, and on a slope, I felt a significant jerk, can somebody tell me what’s going on?

Add to this, I am not sure, the dealer did not sound very right. FWIW, shouldn’t there be a filter, and gaskets as well? Or is there another way to just drain the oil?

Are there any videos of what the oil-change work should look like? The dealer also gave me a list of items, of course, one was the seal, the other was a small black tube of some sort. But I am a bit concerned, so if somebody could point me to a video, that’d be great!

findalex

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Maybe they underfilled the transmission fluid. It expands when hot, so you might not have issues unless it’s cold or on a slope.

If you have the s-tronic transmission, there is a filter. Or if you have the multitronic CVT, then the filter changes aren’t part of the serice schedule. You can change them, of course, but Audi doesn’t consider it necessary. They also considers the ATF in the tiptronics as «lifetime». hahaha

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Here’s an update.

So, they did a fluid change, and when I reached home, my car was stinking. I figured a dead rat! Two days, stinks, sometimes inside the cabin as well. Lifted the hood, there was some amount of oil, right under the tranny.

Took it back, apparently there was a faulty gasket in the line somewhere that was leaking. About 100 miles, and it had leaked about 0,6 litres (I guess it is the same as 0,6 quarts) of oil! They changed the gasket, left the engine running, and topped up the fluid, and then sprayed brake cleaner on the underneath, and then washed it off with car wash shampoo + water to get rid of the oil.

Well, the smell’s still there . a bit faint now. Let’s see.

findalex

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Yeah the fluid stinks due to the additives they add in there. But it’s better that you could detect the leak early. 0.6 liters is not too bad. Anything more and you would probably start to experience weird shifting and cause damage.

It might take a few days to a week for the smell to dissipate.

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So, here’s from a newbie!

I was also advised to monitor if there are further leaks at home. I saw the mechanic using some sort of a special lights, turns out it was a UV torch, i.e. bluish-violetish light. Apparently, if there is a leak, then the oil kinda glows like neon.

I bought myself one of these, wasn’t too expensive for about 19,90 EUR, shone it for all it was worth, and so far so good. I also washed it again, this time with my own car shampoo and rinsed it off well. Seems ok for now.

But this UV lamp thing was new to me. Do the others know about this? Common trick?

findalex

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UV dye is very commonly used to detect leaks from the engine, or air conditioning.

In order for it to work, you need to put the dye the engine oil/transmission fluid/air conditioning oil. You then need both a black light and a special pair of yellow safety glasses. When the black light hits the UV dye, it will apprear to glow when you have the glasses on. You need all 3 components. Otherwise, he’s just lying to you. something that unfortunately happens too often in the auto repair industry.

The only gasket they should’ve touched is the drain plug gasket. So if you don’t see it an dirty oily residue around there, then you should be fine. If you do see some dirt with oil, shine some light with yellow glasses and you will know if they put the dye in.

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Dave Kwatro

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Depends on which auto gearbox you have? The Castrol Dextron is a general ATF fluid. Audi tend to have special oil variants for their auto boxes.

2007-2012 — 6 speed auto = Tiptronic Quattro / 8 speed = Multi-tronic front wheel drive
2012-2016 — 8 speed auto = Multi-tronic Front wheel drive / 7 speed auto = Quattro DSG S-tronic

They all have different oil specifications.

SimonRoma

Premium Member

Black 2005 S4 B6 Avant with V8 4.2 auto, 210k kms and FASH from Audi Switzerland. Full spec with Recaro grey leather interior and heated front memory seats, 18 inch alloys, electric sunroof plus loads of stuff. Great condition for her age too plus no badges. Just fitted a full set of Brembo brake rotors and pads plus new set of Conti tyres. Wheels refurbished in gunmetal grey. Just replaced gearbox oil.