Hi,

I can understand where you are coming from and having things, like those sounds changing and wanting an explanation.
I’m no guru but I’m in the mix of life just like you! (:-)

I can say without a doubt the changes are happening because you are there!
You are interacting with the car or otherwise we would not be engaged in trying to figure this out.
The next thing to consider is the cars environment and age of all the variations that go on with that. It’s a cause and affect relationship.

Temperature and humidity play a key role with things.
Even barometric pressures, as subtle as they move, effect our planets surface. It’s the inside of our planet and stuff way outside it.
It’s a living physics experiment that’s has some constants but at the same time surprises we have yet to comprehend.

Your car was built by those born on earth, expect some unknowns!
I’m not familiar with the car and of course, any type “mass changing” experiment unique to a M90’s dual clutch?
Like I said it’s an interesting type of clutch and transmission you have!
Unknown condition too!

I will say one thing that’s it’s most likely something called “Friction Plate Dust” build up.
Just like brake pads squeal and it develops on some cars while others have no issues what so ever!
Is it the pads, the rotors or a drivers habit and/or locality?
You got me?

If you park the car in the same place but you never turn it around and to get out differently?
That’s an Interesting slant on things. (:-)
What do you do, back up in a circle? It, Might explain, half of the time? (:)

I can only guess, something is changing, but it leads me to believe there’s always a variable going on!
I have no direct answer except it’s still drivable.
It will resolve itself but who knows how?

Tell us what oil you have to put in this transmission.
I’m experimenting with a brand called Fuchs on my two M47’s. Less expensive than OEM and authorized handling markups. It’s a synthetic thermal oil just like Amarin states.
So far no issue within them getting more noisy but I know the oil, in itself, won’t fix what is mechanically not right.
Wrong oil, from a PO’s Indy, hurt one really bad! I have it pulled out.

Volvo doesn’t make their oil.
They buy from vendors just like doctors buy drugs from certified drug peddlers!
Who knows if a car or a human body is going to have a bad reaction to an ingredient in something, before they use it? Stupid drug commercials!

Volvo now has three different part numbers. Upgrades or what?
What about Dexron’s past and GM’s woes?
Go figure, that what I’m doing, is a “very low pay grade” experiment. (:-)

I could suggest you blow the clutch out with dry compressed air or even use a very cleaning light solvent combination. Short of an inspection and that’s a half circle, In, itself.
If your oil is low, It had to go someplace!
Like the links show from Turbobricks, we just don’t know a lot.

Brake calipers can benefit from a blow job but a investigation but a correction is best.
Being they are brakes and all!

Imagine back when parking brakes were on the mounted right on driveline shaft behind the transmission.
Even stagecoaches had wheel brakes.
Around and around we go!
If you slow down you might get run over, today!


Phil