09-18-2023, 08:08 PM | #1 |
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Rear Diff fluid at 30,000 miles
I changed my diff fluid last week in my 2020 M340i w/M Sport Differential. I used Hypoid Axle Oil G-4 P/N83222447362. Pictured is the old fluid versus the new G-4 axle oil. I also used the differential tool from FCP Euro B33000000.
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09-19-2023, 05:52 AM | #3 |
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dhock_holiday210.50 |
09-19-2023, 08:17 AM | #4 |
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I wonder if a lot of that has to be the friction material from initial break-in. This was from my X5MC at the 1200 mile service. Did you see a lot of suspended metal in the fluid?
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09-19-2023, 01:43 PM | #5 | |
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How did yoy extract the fluid? I used that tool and a $40 oil pump from northern tool. Im sure your diff also lacks a drain plug? |
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09-19-2023, 02:07 PM | #6 | |
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Delighted_Jester41.00 |
09-24-2023, 04:31 AM | #7 |
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Well that's not good to see, just passed 46K and diff is untouched and "sweating" per dealer. Took it in and they said it's normal per TSB. Gonna try taking it in again before warranty ends to hopefully get a new cover and some fresh fluid in there.
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09-24-2023, 06:02 PM | #8 |
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Sorry to hear about that. If you get a new cover, youll also get new fluid, so i hope they replace it for you! Leaks are never "normal" but some can be ignored. Thankfully my 2020 does not sweat any fluid.
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02-28-2024, 02:17 AM | #9 |
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Thought I'd update, got it changed out at 50K and I'm glad I did. Fluid came out looking like metallic nail polish. Measured 700ML that came out and ended up filling 900ML. Clunk/thump severely reduced especially when cold, obvious since it seeped out a good amount. Highly recommend if you plan on keeping long term and if driven hard.
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