Oil change on the rear axle.

[alf@75]

Hey

I want`to change all the oil in the rear differensial on my Q4 before starting to use the car.
Is there any smart/easy way to do this, and which oil do people use on this car? Seems pretty difficult to meassure and get 1,135 litres into a little hole under the car

Espen

[164 TD]

The silicon oil in the viscomatic itself cannot be replaced, all others can.

Make sure you use the right oils.

[alf@75]

The picture you have ther are from the manual i`m missing, do you have the hole thing?

Do I have to use the Tutela make, or any make with the right viscosity?
Is it difficult to do this operation?

[164 TD]

[g84]

[alf@75]

[164 TD]

So far I haven't done it, but for gearboxes, this is the normal procedure.

I have the servicemanual for the Q4 on microfiches, this winter I will rent a hi-res diascanner and scan them in.

[g84]

[alf@75]

Ok. Maybe anyone have done this operation and can give us a how to do guide???

[ALFAHEIDA]

Well....I think youre the one who has to convince us.
Make a nice topic-how to.
We have to learn from each other.
Goodluck anyway!

[fasani]

Edit complete.

[Alfan]

Bringing this thread back to life. Their may be others that I missed.

Which oils are you using on your Q4, engine oil, gearbox, power steering etc?

I have the following in mine:

Engine: Castrol Edge 10W60
Gearbox: Synpower TDL 75W-90
Power steering: Dexron ATF (red)

I can see that Tutela GI/R is available again and is used in 159 and Brera/Spider power steering.

[Maffia_Alfista]

Engine: Castrol Edge 0W-40 A3/B4

Power steering/Visco-hydraylics: Total LHM+ (For Citroen hydraulics)
Works great, used for Q4s by Alfa workshop AR-Bil in Stockholm that have/had an mechanic with 3 Q4s.

Alfan: Are you happy with Synpower TDL 75W-90 for the gearbox?
I'm thinking of changing gearbox-, visco- and diff oils soon.

What are you guys running in:

* Gearbox + Front diff
* Rear diff
* Viscomatic Coupling Engagement Mechanism + Viscomatic Epicycloidal Group

[Alfan]

[Maffia_Alfista]

[g84]

[Alfan]

@Maffia: It only says 'Gearoil' from when the diff oils were replaced in 2004. Maybe it is time to have it replaced again...

[Vehje]

I didnt find any better topic for my question and I dont want to make a new topic if there are a simple anwer to my needs: I think my Q4 rear differential is jamming. For example sometimes when I reverse from the parking lot and turn when reversing, I hear a gravel grisling under the rear wheels and the car doesnt want to move. Then suddenly a loud "TUMB"-sound (and brown stripe in my underwear) and the car moves again easily. Is the only option to tear apart the rear torsen? In my mind there is no other way to fix this behaviour. Has anyone ever had same problems?

[Alfan]

I have not had this issue, so cannot comment directly on it.

From what I recall reading about the Viscomatic, some of the oil compartments are closed, so not possible to change oil. If you have replaced the fluids where possible, this might be the last option. Without having heard the sound and behaviour, it is not easy to pin point, but what ever you find out, it will be good to know about.