Diff oil change

5.0 V10 50v biturbo - 571 bhp
Post Reply
User avatar
longman h
4th Gear
Posts: 797
Joined: Tue Oct 29, 2013 7:07 pm
Location: Northern Kent

Diff oil change

Post by longman h » Fri Feb 03, 2017 8:17 am

How often should the above be changed please?

I think Audi class it as sealed for life ( :audibash: ) but I'm not convinced.

Any thoughts please?

Ta.
Daytona Grey C6 RS6 Avant
Ebony Black C5 RS6 Plus - Gone

User avatar
IanH755
Top Gear
Posts: 1987
Joined: Thu Jan 02, 2014 12:50 pm
Location: Stoke and Norfolk

Re: Diff oil change

Post by IanH755 » Fri Feb 03, 2017 10:48 am

I tend to over-maintain my cars so bear that in mind (and my power figure) as I know this is definately excessive but I'll be doing mine every 20k miles along with the GB oil change. It's an extra £50-70 for 5L of oil for all 3 diffs (depending on brand) and I like Motul 300 and 300 LS but OEM should be fine on everything upto & including a stage 2 car.
Last edited by IanH755 on Fri Feb 03, 2017 10:49 am, edited 1 time in total.
***OLD*** Daytona C5 RS6 Avant - MRC'd - 500HP & 820NM (PistonHeads Link).

***NEW*** Daytona C6 RS6 Avant - MRC'd - 955HP & 1200NM (PistonHeads Link)

User avatar
longman h
4th Gear
Posts: 797
Joined: Tue Oct 29, 2013 7:07 pm
Location: Northern Kent

Re: Diff oil change

Post by longman h » Fri Feb 03, 2017 10:49 am

Brilliant, cheers mate
Daytona Grey C6 RS6 Avant
Ebony Black C5 RS6 Plus - Gone

rs6_sid
2nd Gear
Posts: 246
Joined: Tue Sep 22, 2015 3:23 pm

Re: Diff oil change

Post by rs6_sid » Fri Feb 03, 2017 12:13 pm

i just did my rear diff with with motel gear 300 very good oil ester based so its quality is many times that of oem , can be had for about £10 - £15 per litre so the same as genuine prices but a lot better quality ,

what did you use in the transfer box and final drive of the gearbox ian ? as i am led to believe you may need a friction modifier in the transfer box ?
c6 rs6 avant- mrc stage 2 -current
bmw e61 m5 saloon
s3 8p stage 2
vw bora tdi hybrid turbo

User avatar
IanH755
Top Gear
Posts: 1987
Joined: Thu Jan 02, 2014 12:50 pm
Location: Stoke and Norfolk

Re: Diff oil change

Post by IanH755 » Fri Feb 03, 2017 1:53 pm

The 300 LS has the friction modifier and would be for the transfer box & front diff (aka the "final drive") as they share the same oil supply and the 300 is for the rear diff (all 75W-90).
Last edited by IanH755 on Sat Feb 04, 2017 10:58 pm, edited 2 times in total.
***OLD*** Daytona C5 RS6 Avant - MRC'd - 500HP & 820NM (PistonHeads Link).

***NEW*** Daytona C6 RS6 Avant - MRC'd - 955HP & 1200NM (PistonHeads Link)

rs6_sid
2nd Gear
Posts: 246
Joined: Tue Sep 22, 2015 3:23 pm

Re: Diff oil change

Post by rs6_sid » Fri Feb 03, 2017 2:04 pm

to make sure we are on about the same part of the box , as audi call it "final drive oil" in the front of the box. on the link bellow oil 6 is transfer with friction modifier or lsd oil 75/90. the final drive oil 5 your saying you just filled with standard gear 300 75-90 . do you know how much audi charge for that "final drive oil " over £100 per litre. if it is thats handy as i have half a tub left so ill get another and over haul the box whilst doing its atf.

http://www.oemepc.com/audi/part_single/ ... 450/lang/e

also what methods have people used for changing atf ? 3 spring to mind

flush leaving the pan and filter on and pushing all the old fluid out, by there way of a flush machine connected to the oil cooler lines.
drop the pan and replace filter and oil you manage to remove about 7L out of 10.5 according to zf kit.
or apparently some remove mechatronic unit and drain that and blow out the torque convert getting as close to a full removal as possible.
c6 rs6 avant- mrc stage 2 -current
bmw e61 m5 saloon
s3 8p stage 2
vw bora tdi hybrid turbo

User avatar
IanH755
Top Gear
Posts: 1987
Joined: Thu Jan 02, 2014 12:50 pm
Location: Stoke and Norfolk

Re: Diff oil change

Post by IanH755 » Sat Feb 04, 2017 10:57 pm

Just to clear up any confusion (I've also edited my post above too) - "Final Drive" is the front diff and both the Final Drive and Transfer box use the same oil supply (75w-90) which requires the friction modifier fluid (Motul 300 LS etc). The final drive doesn't actually need the modifier but it gets it's oil from the same tank as the transfer box.

The rear diff alone uses "normal" 75w-90 diff oil (Motul 300 etc).

ATF Change - MRC/Unit20 both use option 2 (drop pan/filter) however after inspection of the GB oil, Unit20 (who I asked) said they can get the oil left in the Torque Converter sucked out too, but thats pretty rare according to Grizz.
***OLD*** Daytona C5 RS6 Avant - MRC'd - 500HP & 820NM (PistonHeads Link).

***NEW*** Daytona C6 RS6 Avant - MRC'd - 955HP & 1200NM (PistonHeads Link)

rs6_sid
2nd Gear
Posts: 246
Joined: Tue Sep 22, 2015 3:23 pm

Re: Diff oil change

Post by rs6_sid » Sun Feb 05, 2017 12:45 pm

I thought so much Ian , that's what confused my oil supplier as audi call it final drive oil . they share the same part no on inspection so that helps, plus Audi charging £108.17 per 1L tub and you need 3 is daylight robbery ! So motul gear 300 lsd oil it is !

Yeah my local Audi specialists wanted to do it that way. I just hate the taught of leaving a about a 1/5 of my fluid in the torque converter
c6 rs6 avant- mrc stage 2 -current
bmw e61 m5 saloon
s3 8p stage 2
vw bora tdi hybrid turbo

User avatar
993turbo
2nd Gear
Posts: 162
Joined: Thu Mar 20, 2014 11:40 pm
Location: Puerto Banus - Marbella

Re: Diff oil change

Post by 993turbo » Sat Apr 21, 2018 3:04 pm

How much oil goes in?

Front diff/transfer?

Rear diff?
RS6 MTM C6 Avant (Daily Driver)
360 Modena (manual)
F430 Spider (F1)
+ 4 classic Porsches

User avatar
CHEQUERED
1st Gear
Posts: 57
Joined: Wed Apr 19, 2017 3:52 am
Location: Australia
Contact:

Re: Diff oil change

Post by CHEQUERED » Sun Apr 22, 2018 12:45 pm

IanH755 wrote:
Fri Feb 03, 2017 10:48 am
I tend to over-maintain my cars so bear that in mind (and my power figure) as I know this is definately excessive but I'll be doing mine every 20k miles along with the GB oil change. It's an extra £50-70 for 5L of oil for all 3 diffs (depending on brand) and I like Motul 300 and 300 LS but OEM should be fine on everything upto & including a stage 2 car.
You cannot go wrong with the Motul we get oil analysis on all our race car (clients and personal) sump / gb / diff oil drops and the motul fares better than just about anything we have tested.

User avatar
A20LEE
4th Gear
Posts: 931
Joined: Fri Apr 18, 2008 9:26 pm
Location: Leeds

Re: Diff oil change

Post by A20LEE » Sun Apr 22, 2018 1:56 pm

Any idea of the cost to have this done at a specialist?

User avatar
993turbo
2nd Gear
Posts: 162
Joined: Thu Mar 20, 2014 11:40 pm
Location: Puerto Banus - Marbella

Re: Diff oil change

Post by 993turbo » Mon Apr 23, 2018 1:15 pm

Just drained the rear diff. About 1litre came out.
RS6 MTM C6 Avant (Daily Driver)
360 Modena (manual)
F430 Spider (F1)
+ 4 classic Porsches

Post Reply

Return to “RS6 / RS6 Plus (C6 Typ 4F) 2008-2010”

Who is online

Users browsing this forum: Phuketpaul, TS811 and 74 guests