DIY: Differential Fluid Change - Page 2

Dannys M3 · 08-22-2012, 02:51 AM

Looking at the photos, those looks like torx bolt for the drain and fill.

driftflo · 08-22-2012, 05:30 AM

14mm allen key... no torx!

Sean05 · 08-22-2012, 07:22 AM

Quote:

Originally Posted by Dannys M3

Looking at the photos, those looks like torx bolt for the drain and fill.

Quote:

Originally Posted by driftflo

14mm allen key... no torx!

Yes thats right.. not a torx...when doing fluid change on our E92 m3 from Oil Change, Tranny and Diff uses HEX... no TORX...

Dannys M3 · 08-22-2012, 09:29 AM

Ok thanks, in the photo it looked like a torx.

ixm3 · 09-10-2012, 11:46 AM

Fwiw, you can use non FM fluid and if the noises bother you, then add FM later.

Sean05 · 09-10-2012, 03:19 PM

Quote:

Originally Posted by ixm3

Fwiw, you can use non FM fluid and if the noises bother you, then add FM later.

yes exactly and if people that will use the NON FM FLUID... make sure to get one at MERC dealer which is

16 bucks a qtz... compare to 30 bucks a qtz for the FM version...

jjw2331 · 09-10-2012, 11:53 PM

Is there any significant difference other than the price between the two oils? For example, does the non-FM perform better vs the FM? Better protection? Better performance from the diff?

bigjae1976 · 09-11-2012, 08:15 AM

I'm using the OE BMW fluid while under warranty.

Has anyone used redline or something else in the rear diff? I would imagine that the Redline 75w-140 would work fine.

Sean05 · 09-11-2012, 08:47 AM

Quote:

Originally Posted by jjw2331

Is there any significant difference other than the price between the two oils? For example, does the non-FM perform better vs the FM? Better protection? Better performance from the diff?

I would assume so... I read somewhere that when your diff starts making the noise BMW will use the FM fluid. I say why wait for that noise just use the FM... I have 72k miles on the car and never made a diff noise, and still opted for the FM fluid just for a piece of mind.

Quote:

Originally Posted by bigjae1976

I'm using the OE BMW fluid while under warranty.

Has anyone used redline or something else in the rear diff? I would imagine that the Redline 75w-140 would work fine.

Yes people have used the REDLINE... they dont have a diff fluid that comes with Friction Modifier but they do have an additive. not sure how much you need to mix it but i think its safer to just get the BMW FM fluid.

driftflo · 09-27-2012, 02:11 PM

the more fm, the less the plates inside the lsd grip (so less noise)... so less locking of course!
it also is aggressive to the oil seal.
so i would only use the fm oil if you really need it and dont want to have noises.

for bmw it is easier and more profitable to sell the fm booster oil and dont have to argue with "customer noises".

if you dont have noise issues or dont mind it, stay with the normal syntrax limited slip for better locking performance and healthy seals!

but when talking about locking performance... if you want a proper performance diff, you will need to swap to a clutch-type lsd anyway... vlsd sucks ;-)

Porschefile · 09-27-2012, 02:18 PM

Quote:

Originally Posted by bigjae1976

I'm using the OE BMW fluid while under warranty.

Has anyone used redline or something else in the rear diff? I would imagine that the Redline 75w-140 would work fine.

I use Redline. It was rec'd by Bimmerworld.

The_Ng · 10-08-2012, 11:55 PM

I also use the Redline 75w140, but remember one think is use the redline 75w140 not the 75w140NS !!!

jdmish · 02-13-2013, 03:11 PM

where did you purchase the fluid with FM booster at??

jjw2331 · 02-13-2013, 03:20 PM

Your dealer should have it or can order it for you. (you need 3 bottles)

Or...

You can order online
http://www.ecstuning.com/BMW-E92-M3-...tial/ES197413/

http://www.turnermotorsport.com/p-29...46-e9x-m3.aspx

Red_Baron · 02-20-2013, 10:40 AM

Newbie question but is this the same process for a DCT car? I remember reading somewhere about DCT and 6MT having different diffs...

jjw2331 · 02-20-2013, 02:15 PM

Quote:

Originally Posted by Red_Baron

Newbie question but is this the same process for a DCT car? I remember reading somewhere about DCT and 6MT having different diffs...

The DCT differential is slightly different in size and has a taller gear from what I understand. However, the process to change the fluid should be the same as well as the differential fluids you use. A quick call to a dealer service foreman should confirm this.

5soko · 03-19-2013, 07:45 PM

Do the plugs have washers or O-rings? Im assuming new drain bolts come with the o ring and both the drain and fill new replacing once opened?

Also anyone have a copy of the TIS of changing the rear diff oil? That would be awesome!

jjw2331 · 03-19-2013, 11:45 PM

Quote:

Originally Posted by 5soko

Do the plugs have washers or O-rings? Im assuming new drain bolts come with the o ring and both the drain and fill new replacing once opened?

Both plugs have rubber o-rings in them. I've reused them with no leaks but it never hurts to use new ones.

09-10-2012, 11:46 AM	#27
ixm3 Second Lieutenant Drives: M3x2 Join Date: Jul 2010 Location: DE Posts: 260 iTrader: (8)	FM Fwiw, you can use non FM fluid and if the noises bother you, then add FM later.

09-11-2012, 08:15 AM	#30
bigjae1976 Brigadier General Drives: 04 330Ci, 11 E90 M3 Individual Join Date: Mar 2006 Location: Milwaukee, WI Posts: 4,046 iTrader: (8)	I'm using the OE BMW fluid while under warranty. Has anyone used redline or something else in the rear diff? I would imagine that the Redline 75w-140 would work fine. __________________

02-13-2013, 03:11 PM	#35
jdmish Private First Class Drives: e92 Join Date: Sep 2008 Location: Southern California Posts: 198 iTrader: (2)	where did you purchase the fluid with FM booster at?? __________________

02-20-2013, 10:40 AM	#37
Red_Baron M3Post DBag Drives: '08 e92 M3, '11 G55 AMG Join Date: Dec 2011 Location: DC/VA/PA Posts: 694 iTrader: (0)	Newbie question but is this the same process for a DCT car? I remember reading somewhere about DCT and 6MT having different diffs... __________________

03-19-2013, 07:45 PM	#39
5soko Brigadier General Drives: ///M5 Join Date: Aug 2007 Location: CALI \|\| NYC Posts: 3,982 iTrader: (4)	Do the plugs have washers or O-rings? Im assuming new drain bolts come with the o ring and both the drain and fill new replacing once opened? Also anyone have a copy of the TIS of changing the rear diff oil? That would be awesome! __________________ Current: ///M5 \|\| ML63AMG \|\| 13' Porsche Panamera S Retired: 2007 E92 335i \|\| 2010 E90 LCI M-sport 335i FBO JB4+ E85

08-22-2012, 02:51 AM	#23
Dannys M3 Captain Drives: Space Grey E92 M3 Join Date: Sep 2006 Location: South Florida Posts: 611 iTrader: (2) Garage List 2008 M3 [5.00]	Looking at the photos, those looks like torx bolt for the drain and fill.

08-22-2012, 05:30 AM	#24
driftflo Enlisted Member Drives: 2012 M3 E92 6MT Join Date: May 2012 Location: europe Posts: 39 iTrader: (0)	14mm allen key... no torx!

08-22-2012, 09:29 AM	#26
Dannys M3 Captain Drives: Space Grey E92 M3 Join Date: Sep 2006 Location: South Florida Posts: 611 iTrader: (2) Garage List 2008 M3 [5.00]	Ok thanks, in the photo it looked like a torx.

09-10-2012, 11:53 PM	#29
jjw2331 Second Lieutenant Drives: 2011 JtBlk e92 M3 Join Date: Sep 2008 Location: Michigan Posts: 252 iTrader: (2)	Is there any significant difference other than the price between the two oils? For example, does the non-FM perform better vs the FM? Better protection? Better performance from the diff?

09-27-2012, 02:11 PM	#32
driftflo Enlisted Member Drives: 2012 M3 E92 6MT Join Date: May 2012 Location: europe Posts: 39 iTrader: (0)	the more fm, the less the plates inside the lsd grip (so less noise)... so less locking of course! it also is aggressive to the oil seal. so i would only use the fm oil if you really need it and dont want to have noises. for bmw it is easier and more profitable to sell the fm booster oil and dont have to argue with "customer noises". if you dont have noise issues or dont mind it, stay with the normal syntrax limited slip for better locking performance and healthy seals! but when talking about locking performance... if you want a proper performance diff, you will need to swap to a clutch-type lsd anyway... vlsd sucks ;-)

10-08-2012, 11:55 PM	#34
The_Ng New Member Drives: M3 Join Date: Mar 2012 Location: Vancouver Posts: 16 iTrader: (0)	I also use the Redline 75w140, but remember one think is use the redline 75w140 not the 75w140NS !!!

02-13-2013, 03:20 PM	#36
jjw2331 Second Lieutenant Drives: 2011 JtBlk e92 M3 Join Date: Sep 2008 Location: Michigan Posts: 252 iTrader: (2)	Your dealer should have it or can order it for you. (you need 3 bottles) Or... You can order online http://www.ecstuning.com/BMW-E92-M3-...tial/ES197413/ http://www.turnermotorsport.com/p-29...46-e9x-m3.aspx

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