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Are they included in any of the services, I notice that there is no inventory in the service book for them, but surly they will need to have the oil changed at some point. Has any body changed there's?

Apparently not, they are sealed units so no changing required so I have been reliably told

I was told the same thing.. Still wondering if there's any harm in getting it changed though.

I just had my engine oil changed today, 7000 km since my last service, and I swear, the engine feels SO much smoother now that it practically SINGS

This debate has been going on for some time within the BMW CC USA. The concensus seems to be that when manufacturers guarantee the units for life we should be happy with "lifetime fill". Until then, changing the gearbox & final drive/s fluids at around 50k/60k can do no harm and it's probably a wise precaution. That's assuming, of course, that they're able to be drained & refilled. BM's are. Don't know about Audi's................ Anybody looked?

Like said, they are sealed units, so not possible unless you ant to strip them to pieces.

OK, cheers, seems a bit strange though, I would have though it would be beneficial to change it out. it seems this topic has been discussed over on in the RS6 forum, they change there's so it seems.

I need some help on this subject please. I have drained my gearbox oil out already but cannot find where you must refill it from. Could anyone shed some light on this please?
Thanks

There might be a level bung on the side of the gearbox that you could fill it through but i really would get some tech help to check first,overfilling could damage the gearbox,iremember one of my escort cossies had a slight leak and had a level bung on the side of it,But the correct level was 10mm (or something) below this and ford used an allen key as a dipper,a friendly tech might be able to help

I have done this now and it was very easy after all. There is a filling bung (10mm allen) on the side of the front diff/gearbox which is just next to the nearside driveshaft flange. The gearbox holds 3.5 ltrs as suggested by TPS who supplied the gear oil. The filling is quite simple, I got a piece of hose and ran it down behind the engine and into the filling hole. Then you just feed the oil in through the hose checking every so often. Coincidently 3.5 ltrs is up to the level of the filling hole on the gearbox. I hope this helps anyone who would like to know as I did.

So they are not sealed then? To be honest it makes sense that they aren't given how oil degrades over time.

Details from ElsaWin:

GEARBOX
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The vehicle must be horizontal when checking gear oil level.
– To check gear oil level, unscrew oil filler plug

Check oil level with a suitable tool (such as a length of wire bent to shape).

Oil level for gearbox with code letters GYH
l Specification: Oil level is correct when gearbox oil is up to lower edge of filler hole.

Oil level for all other gearbox versions
l Specification: Oil level 2 ± 1 mm below lower edge of oil filler hole.

40Nm torque for filler plug
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RS4 box is HND i believe, so we are the 2mm below edge.

For HNR rear diff, capacity 0.9 litres, instructions:

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The oil level is correct when the rear final drive is filled to the lower edge of the filler hole.

Filler plug 45Nm torque.
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