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E60 (2004 - 2010)
BMW 5-Series (E60 chassis) was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E60 is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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  #1  
Old 12-14-2011, 09:01 AM
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phlfly phlfly is offline
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What kind a E60 550 rear differential?

I have a sport package so I was thinking if the rear differential on 550 is limited slip or it's just normal one. I have radiator on rear side of the differential.
I was looking to replace fluid there so if it limited slip I wanted to use this :BMW SAF-XJ + FM Booster, yes expensive but that sh.. is only working, at least I know since I had E46 M3.

Thanks
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  #2  
Old 12-14-2011, 09:51 AM
Munich77 Munich77 is offline
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I don't think BMW gives its non-M models a true limited slip diff but I might be mistaken.
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  #3  
Old 12-15-2011, 01:00 PM
jugnoo jugnoo is offline
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Mein Auto: 2010 535i M-sport
I know about 2008 550i specifically since I used to have it. It is open diff and you need Castrol SAF-XO not XJ. I am gonna use Motul gear 300 when I go for diff fluid change next week.
550i sport 6MT has a higher ratio diff but its still open... all non M cars are open diff as DSC brakes side to side to shift power.
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  #4  
Old 12-15-2011, 01:38 PM
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phlfly phlfly is offline
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Thanks. So you are using Mutol gear oil, so it's not something special about this oil.
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  #5  
Old 12-16-2011, 10:31 AM
jugnoo jugnoo is offline
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nope nothing special. Only LSD needs friction modifiers for LSD to operate. We have open diff so just use synthetic GL-5 75-90W of your choice.
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  #6  
Old 05-18-2012, 11:58 PM
bimmerfan52 bimmerfan52 is offline
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OEM Differential Fluid

I was in the local $tealer last week picking up some parts and since I was planning on changing the differential fluid ( 545i with 82K miles), I inquired about the SAF-XO gear oil, and was told they charge $31.00 per liter. Whoa, what do they put in it, gold flakes?

I bought two of the screw plugs with integrated o-ring (PN 33-11-7-525-064). Not sure if this was necessary but the Bentley’s manual recommended it, and at about $6.50 each I figured if I used the old plugs, one of them leaked and I had to do it all over again I would be pissed.

At $62 for two quarts I decided to look elsewhere at there are a lot of good brands of gear oil for a lot less. All the posts I read confirmed that Castrol does not market this oil themselves at retail in a quart size. But I searched around the web and low and behold found several posts that said Land Rover sells Castrol SAF-XO gear oil (which BMW buys from Castrol and calls it “BMW SAF-XO”) as Land Rover part number LRN7591.

Wanting to make sure it was definitely the same I continued to search until I found a Land Rover spec sheet that cross references Castrol SAF-XO product as its part number LRN7591 (PDF attached SAF-XO is shown on page 5, line 2).

I called the local Land Rover dealership and inquired. $9.21 per quart. So the next time I went by the dealership I purchased two quarts.

Later I found it online for $6.87 per quart.
http://www.parts.com/parts/index.cfm...earch&siteid=2

Probably any brand name full synthetic 75W90 gear oil would do the job, but it is nice to know that you can use the OEM fill at a very reasonable price.

The savings over buying the gear oil at the BMW $tealer was enough to buy my tools at Harbor Freight (liquid transfer pump @ $3.99 with coupon and nine-piece hex driver socket set @ $13.99 on sale), the two plugs at $13.00 and I still had enough left over for a six-pack of brewskis.

The stuff that came out smelled OK, but it looked pretty nasty compared to the new oil going in (won’t bore you with another before and after picture), but overall the job was a piece of cake. Cheap insurance as I love the car and would like to drive it another 80K miles without spending an arm and a leg on repairs.
Attached Files
File Type: pdf LandRoverFluids SAF_XO .pdf (56.0 KB, 317 views)
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  #7  
Old 05-19-2012, 06:54 AM
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phlfly phlfly is offline
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Look like it's long life Castrol gear oil, that used be called SAF-XO

http://www.opieoils.co.uk/p-737-cast...xo-75w-90.aspx
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  #8  
Old 05-19-2012, 07:20 AM
bimmerfan52 bimmerfan52 is offline
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Thanks for your reply.

Given the date of 2005 on the list, this must have been the OEM fill in my 2004.

Any idea how SAF-XO has changed since then? I assume like other chemicals it has gotten better.

Update:
Looks like for the quart bottle they market it as "formerly SAF-XO".
But when distributors sell it by the barrel they still call it SAF-XO.
http://lubsboutic.com/CASTROL-SAF-XQ-75W-90

In both cases (retail quart and barrel) they specify BMW SIB 33 01 96 (149).

Good enough for me.

Last edited by bimmerfan52; 05-19-2012 at 08:23 AM.
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  #9  
Old 06-13-2012, 11:49 AM
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phlfly phlfly is offline
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So I decided to replace my diff fluid as well. So I went to dealer and they sold me just over 2 L for 38 bucks. The guy at parts applied some discount, he is always gave me one.
Also I asked shop foreman to make sure I don't have limited slip diff, so he checked and told me that the 550i manual and SMG were coming with slip diff, so it has diff fluid called 75W-140 SAF XJ, btw the price same as 75W-90. But my car doesn't have one.
BTW the prices to compare to: Mobil Syn 18 per qt, Lubo Molly is 16 per qt, Motul is 19-25 bucks per qt. So I guess it's not bad and its OEM fluid, just as piece of mind. If you want a connection at BMW Sterling send me private msg. I don't want his name went on internet, and he lose a job.
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Last edited by phlfly; 06-13-2012 at 12:00 PM.
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  #10  
Old 06-14-2012, 01:31 AM
Arctic-Rodz Arctic-Rodz is offline
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how many miles are on your car that you're thinking about new gear oil?
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  #11  
Old 06-14-2012, 05:16 AM
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79,000 miles, I think it's a good point to do, and I will have a long trip in mid July.
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  #12  
Old 06-25-2012, 06:30 PM
drcomp drcomp is offline
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i inquired about doing a tranny and diff drain to my indy. he suggested to use agip fluid. anyone ever use that stuff?
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  #13  
Old 06-25-2012, 07:20 PM
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I don't but I guess if you can buy in Phila this fluid go ahead and do it. I know some performance cars like Ferrari, Porsche is using fluid from Agip.
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  #14  
Old 06-25-2012, 07:24 PM
drcomp drcomp is offline
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yea he works on alot of those cars. he says the trans fluid is surprisingly cheap, $19 a liter. he loves the agip synthietic motor oil as well
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  #15  
Old 06-26-2012, 07:05 AM
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borderchris borderchris is offline
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Quote:
Originally Posted by phlfly View Post
I have a sport package so I was thinking if the rear differential on 550 is limited slip or it's just normal one. I have radiator on rear side of the differential.
I was looking to replace fluid there so if it limited slip I wanted to use this :BMW SAF-XJ + FM Booster, yes expensive but that sh.. is only working, at least I know since I had E46 M3.

Thanks
You do not have a LSD. Only M5s get LSD, no exceptions.
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  #16  
Old 06-26-2012, 07:12 AM
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phlfly phlfly is offline
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Quote:
Originally Posted by borderchris View Post
You do not have a LSD. Only M5s get LSD, no exceptions.
If read my one of the posts here, if you would know it's not all true. I have information from foreman shop, and he knows for sure, some 550 with M pckg came with LSD
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  #17  
Old 06-26-2012, 07:36 AM
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borderchris borderchris is offline
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You're absolutely incorrect, and I'm not going to argue with you. You're "shop foreman" doesn't know what he's talking about. Let me put it this way. I check carefully before I post, and this is something that I've checked carefully. With BMW.

Also, here's your parts; they're the same for all execpt M5.

http://www.realoem.com/bmw/showparts...61&hg=33&fg=05


You don't have a LSD. But if you want to keep fantasizing, or thinking that certain oils make your car slower ... Be my guest. BTW, last post on this...

...

Last edited by borderchris; 06-26-2012 at 07:44 AM.
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  #18  
Old 06-26-2012, 09:07 AM
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phlfly phlfly is offline
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Quote:
Originally Posted by borderchris View Post
You're absolutely incorrect, and I'm not going to argue with you. You're "shop foreman" doesn't know what he's talking about. Let me put it this way. I check carefully before I post, and this is something that I've checked carefully. With BMW.

Also, here's your parts; they're the same for all execpt M5.

http://www.realoem.com/bmw/showparts...61&hg=33&fg=05


You don't have a LSD. But if you want to keep fantasizing, or thinking that certain oils make your car slower ... Be my guest. BTW, last post on this...

...
I know that already I don't have LSD.
But how do you know from part catalog if it's LSD or open?
http://realoem.com/bmw/showparts.do?...61&hg=33&fg=05
P/n is different but price about same.
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Last edited by phlfly; 06-27-2012 at 05:00 AM.
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  #19  
Old 06-27-2012, 06:51 AM
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Quote:
Originally Posted by borderchris View Post
But if you want to keep fantasizing, or thinking that certain oils make your car slower ... Be my guest. BTW, last post on this...

...
Well of course it's hard to understand oil specification, friction and flow physics for everyman user.
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