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Old 10-12-2017, 08:44 PM   #11
njsarn
 
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Default Re: Front Differential Fluid Change

After a 4,300 miles trip to Seattle WA and back, I'm happy to report that the 75W 140 Mobile 1 with 30 ml (1 oz) of Lubegard 63010 Platinum Universal ATF (friction & wear reducer) to 1 Quart (1000 ml) of Mobil 1 75W-140 did work fine. The front differential whine is now nearly background noise that I can live with. The front differential has a vent tube, I haven't checked the rear diff yet.
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Old 10-19-2017, 04:04 PM   #12
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Default Re: Front Differential Fluid Change

Does anyone working on their front diffs have access to info about the correct oil for the transfer-case? Thought it might be good to have that info here too for future users as the diff and t-case are supposed to be serviced at the same mileage interval (according to my 2015 maintenance book).

I just changed the oil in my front diff at 50k miles and used Mobil Delvac 75w-90 which has MB-Approval 235.8. Note: the oil was completely black at this mileage and the magnet had a complete coating of metal "powder". No large shavings or filings seen.

On the transfer-case, I found this thread from last year which suggests that the Oberainger documentation calls for the same gear-oil in the front diff and transfer-case. I had planned to install the Delvac in both units but, when I pulled the fill plug on my transfer-case, I found ATF in it (or so it appears). I didn't drain it with no sure way to refill so I wondered if anybody else knew what's supposed to be in there.

My 2015 MB manuals barely acknowledge that the van is 4x4 so the "fluids" section only has info for the engine/transmission/rear-diff oils.
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Old 10-19-2017, 09:16 PM   #13
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Default Re: Front Differential Fluid Change

According to Oberainger tech data the following is correct on the front diff/transfer case;

Front Diff = .7 liter, 75w-90
Transfer Case = 1 liter, ATF 134 236.12 spec, (Fuchs ATF 3353 or similar)

Straight outa the service manual..
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Old 10-19-2017, 09:46 PM   #14
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Default Re: Front Differential Fluid Change

Perfect - thank you! I'm sure your info will be a help to others searching for it in the future - the documentation sent with the vans is not useful.
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Old 10-19-2017, 11:56 PM   #15
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Default Re: Front Differential Fluid Change

I wonder how the Swepco fluids would meet MB standards. They are used in all manner of Porsche factory race vehicles...

I use the Swepco 203 in my (expensive and fragile) Sycncro Vanagon transmission, as do many others in the Vanagon world. It has been promoted by associated professionals in the gear industry, who are also syncro-heads, due to it's longevity, heat resistance, and protective qualities.

The technical data sheets don't call out the specific MB 235.8(?) but does state 'European & Japanese gear manufacturer specifications' along with a myriad of OTR trucks, tractors, and industrial specifications.

Swepco 201, 203 (more Moly), and 210 (hot weather?) are the grades I've seen used.
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Old 03-04-2018, 09:20 PM   #16
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Default Re: Front Differential Fluid Change

After the successful 4,000 miles trip to Seattle, WA, came back to San Diego, CA. The front differential sounds were subdued. However, about 4,500 miles, the Check Engine light came on so I had the MBz shop look at it. They said the front differential pressure sensor was faulty and so they replaced it under factory warranty. So far it's been reasonably good. Will report back of any issues.

One MUST DO ITEM is a compatibility test before adding any additives. This is done by taking a shot glass or a small glass mirror or any glass surface, put about 10-20 drops of the 70W-140 gear oil on it then add about 5 drops of the additive to it. If it looks cloudy then the additive is incompatible with the 70W-90 or the 70W140 which ever you choose. If the mixture fluid remains clear then you can use the additive. The consequence is grave if the additive precipitates inside the gear housing.
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Old 03-05-2018, 12:08 AM   #17
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Default Re: Front Differential Fluid Change

They just replaced the sensor for you correct? Not the whole differential? I sent you a private message regarding an update. I ordered the additive on amazon to use it in mine.
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Old 06-01-2018, 07:40 AM   #18
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Default Re: Front Differential Fluid Change

Hello,

Forgive me for my english not perfect, I write from Italy.
I have a vito 115 4x4 my2006 with the same differential oberaigner of the sprinter. I think the noise is caused by the planetary gears present in the differential, I tried to put oil 75w140 and additives sintoflon gear lube but the noise is there.
Has anyone found a solution without changing the differential? In the long run can it lead to breakage?
Good day
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Old 06-01-2018, 11:10 PM   #19
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Default Re: Front Differential Fluid Change

Quote:
Originally Posted by njsarn View Post
Decided to open the Front Differential at 850 miles and drained the fluid (Thanks to zither99). Very little if any oil came out of the fill hole. When drained, about 500 ml of the differential oil that came out, fluid was still clear but the drain plug magnet was filled with black gunk and some metal shavings (see picture of the rag). This is very unusual IMO for a almost brand new vehicle.
To the new differential fluid, I added 30 ml (1 oz) of Lubegard 63010 Platinum Universal ATF (friction & wear reducer) to 1 Quart (1000 ml) of Mobil 1 75W-140 (manual calls for 75W-90) gear oil. (Did the miscibility test prior to the mixing and no sign of separation, cloudiness or precipitation). Then I parked the Van with the front end a little down slope (on the driveway) to maximize the fill capacity. The amount of total diff. fluid added was about 600 ml. See attached pdf file.
Test drove and the low whining noise was still there but somewhat lower and softer than before (imagination?). It's now ready to go on a long trip. Well, did my best and forgetting the rest (Tony H. P90X moto). At least I've confirmed that the noise came from the front differential.
Lube gard makes an additive meant for gear oil.....Gear oil supplement.
If I were to add anything to the approved MB 75/90 gear oil, I would use that rather than the ATF
supplement.
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Old 06-02-2018, 01:06 AM   #20
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Default Re: Front Differential Fluid Change

Molybdenum disulfide additives can quiet loud gears sometimes.
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