06-28-2023, 12:16 PM | #1 |
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Replacing driveline fluids
Hey all. Longtime e83 owner (207k miles currently), and will likely be moving on to a G01 in the near future. I've started to narrow down what I want (looking at 2020+ MY M40i), and have been trying to understand what it will take to maintain this vehicle for the long term. I've been doing all of my own work for a few years now, and want to continue that trend.
So, given that, I've been trying to find DIYs on fluid changes for diffs, xfer case, and the transmission, but haven't found anything (perhaps my search terms haven't been correct). Please, no thoughts on these having lifetime fluids; I plan to change them on any vehicle I own long term. Has anyone on here attempted these, and if so, anything hinky with the process? I have to take my x3 this weekend for their second crack at the PCV heater recall, so I'll ask my SA about it while I'm there...he seems relatively competent. Thanks for any thoughts on this.
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06-28-2023, 03:06 PM | #3 |
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Here are the operating fluid requirements:
Technically suitable engine oils for BMW Group engines.pdf Technically suitable automatic transmission fluid for ZF GA8HP50Z, GA8HP51Z (SBS-ANL-SBS1996-240.pdf Technically suitable brake fluid (SBS-ANL-SBS1996-340396150_A3_V.7).pdf Technically suitable coolant (SBS-ANL-SBS2018-170196140_A_V.15).pdf Technically suitable front axle transmission oils (SBS-ANL-SBS2018-310296147_V.3).pdf Technically suitable rear differential fluid (SBS-ANL-SBS2018-330196149_AX_V.9).pdf Technically suitable transfer case fluid (SBS-ANL-SBS2018-270196146_AX_V.5).pdf Last edited by mattsheng; 01-07-2024 at 01:58 PM.. |
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06-29-2023, 08:27 AM | #5 |
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Shout out to mattsheng He is truly a great asset to folks on this site.
After having spent a lifetime around rotating machinery I'll chime in and agree with the OP there is no such thing as lifetime fluids. Only fluids that will last until you're past the warranty period. My SA at my local dealership agreed with me on that. |
07-05-2023, 05:08 PM | #6 |
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This is great info! Thanks for your reply to my question. I wish search worked better, might be better off scrolling through the forum!
Looks like the B58B30O1 AWD calls for 7.2L vs 6.5L - first I saw that. Based on the instruction it looks applicable to a drain and fill, guess I am glad I ordered 8L rather than 7L! Off topic question, is the oil pan actually bigger or does this include oil lines and cooler that ultimately drain back when the car is off? |
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07-05-2023, 06:55 PM | #8 | |
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07-07-2023, 03:15 PM | #9 |
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I am a little confused with the transfer case. Looks like you need to trigger “oil change” that opens up the chambers for full evacuation and possibly triggers some adaptation reset?
Anyone know what tool does this? I was reading something on ISTA but honestly got super confused there on what is needed and how to get it. I will keep reading, but wanted to ask. |
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07-07-2023, 03:46 PM | #10 | |
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07-07-2023, 04:25 PM | #11 |
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Sweet, thanks!
Now to read about how to get and use ISTA lol My bread and butter is GM and HP Tuners so this is all new, so I really appreciate your help accelerating my learning! |
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08-06-2024, 11:09 AM | #12 |
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Reviving an old thread.
Have a 2021 x3 M40i and trying to determine which rear diff I have. I looked up the vin using mdecoder but do not see which diff listed. It just has M sport suspension listed. Would it have said M differential specifically? I also looked at the window sticker and I don’t see it there either. Trying to determine which diff fluid and the proper procedure. Do I just use a fluid extractor to pull the fluid then refill up to the fill hole with G5 oil? Same plug or replacement? Any sealant on the plug? |
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08-06-2024, 11:40 AM | #13 |
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I ended up getting new plugs since it has a seal. Probably not completely necessary and worth taking the risk especially if it’s just for the fill plug.
I don’t have any good insights to give you on the differential type. That was confusing for me as well as I did not see any clear markings to help differentiate. M Sport Differential is specific and should be a line item on the window sticker as it’s an up charge. Some of the fill procedures call for a specific volume and you might not be able to fill up to the bottom of the threads as it could cause leakage out of shaft seals. I filled the differentials on the X3 based on volume. My truck was stupid, they tell you it needs to be so many Millimeters below the fill plug. If I fill it up too much it will start to seep out of the pinion seal. |
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