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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Wed, Nov-03-2010, 05:35:48 PM   #1
nimbleRteam
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Default differential fluid question.

Hello everyone, I have a question about this differential fluid http://www.turnermotorsport.com/html...MOGRCMP-75W140

Will this be safe to use on my car?
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Old Wed, Nov-03-2010, 05:37:33 PM   #2
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http://www.ecstuning.com/BMW-E46-M3-...ial/ES1895208/

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Old Wed, Nov-03-2010, 06:11:49 PM   #3
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Originally Posted by GRKM3 View Post
Agreed. I put some Royal Purple in my diff ONLY because I had some in the garage and now my seals are leaking. Sure it could be a coincidence, but I bought the OEM stuff to replace it with. I ran the diff for about 2500 with the RP.

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Old Wed, Nov-03-2010, 06:41:09 PM   #4
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Some M3s use 12mm plugs while others are 14mm. Anybody know which size ECS includes?
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Old Wed, Nov-03-2010, 08:08:19 PM   #5
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Some M3s use 12mm plugs while others are 14mm. Anybody know which size ECS includes?
The thread is the same on both, only diff is the socket size. I had 12mm and exchanged with 14mm on my first diff flush.

I put RP on mine and after reading about the possible issues, I went to dealer got the bottles of the XJ-FM OEM oil and havent looked back. Go OEM on this one.
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Old Wed, Nov-03-2010, 07:59:12 PM   #6
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Originally Posted by nimbleRteam View Post
Hello everyone, I have a question about this differential fluid http://www.turnermotorsport.com/html...MOGRCMP-75W140

Will this be safe to use on my car?
I've had it in my car for a couple of years with no issues and no noises. It comes highly recommended by a lot of race teams and it costs a fraction of what the OEM fluid costs...
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Old Wed, Nov-03-2010, 09:12:10 PM   #7
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Go OEM on this one. The M-Variable unit is not your average clutch based LSD.

Pelican Parts has a (3) bottle 450mL kit for much cheaper than the stealer.

http://www.pelicanparts.com/cgi-bin/...ontainer%29%20
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Old Wed, Nov-03-2010, 09:30:52 PM   #8
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There has been a long going debate about using aftermarket vs. OEM fluid when it comes to the differential. I spoke with Dan (www.diffsonline.com) about this very issue and his response was to go the OEM route. He indicated that it had to do with the mixture of friction modifiers. He also indicated that he believed that the OEM LSD carrier was not that good and needed all the help it can get.

I recently changed to Red Line 75w140, and have just over 2K miles on it with no issues or sounds. I plan on continuing to monitor it and if I need to I'll change it as necessary. I have a couple of AutoXs coming up next month, which I believe will be the true test for me.
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Old Thu, Nov-04-2010, 03:04:06 AM   #9
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i just changed my diff with the OEM. i have 50k on the car and was experiencing the growning sound. The old fluid was still golden in colour. So for a second, I felt that i may have wasted $130 dollars. But with the new fluid in, is totally quiet now. Perhaps the old fluid didn't have the friction modifiers?
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Old Thu, Nov-04-2010, 04:19:14 AM   #10
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i just changed my diff with the OEM. i have 50k on the car and was experiencing the growning sound. The old fluid was still golden in colour. So for a second, I felt that i may have wasted $130 dollars. But with the new fluid in, is totally quiet now. Perhaps the old fluid didn't have the friction modifiers?
My car has the regular fluid (not the expensive FX one) dealer put in during inspection 2 and it has zero noise on the differential. Someone mentioned that there are two different non-FX fluid, one in bulk and the the other comes in half pint size. Mine is the half pint ones and not sure what it has.
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Discussing differential fluid question. in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)