[Aronis]

inside of Transfer case (I have video also).

From 328 but probably very similar to M5.

Mike

[F10Mfizzy]

Originally Posted by Aronis

Transfer case has to have a tube like a hook, put it in to the low point of the TC and suck out the fluid. Odd design, but that is what I had to do.

Mike

Thank you ! When you get a chance if you don’t mind can u post a pic of the hook tube you used ? I need to get one like yours. A shop Is telling me 300 to do transfer case but screw that I have quick jacks the transfer case is exposed it’s easy if I get the right hook tube to get in there.. thank you for your help!

[Aronis]

Originally Posted by F10Mfizzy

Thank you ! When you get a chance if you don’t mind can u post a pic of the hook tube you used ? I need to get one like yours. A shop Is telling me 300 to do transfer case but screw that I have quick jacks the transfer case is exposed it’s easy if I get the right hook tube to get in there.. thank you for your help!

I used this and bent the tubing to the shape I needed. Worked great.

SMOTIVEPRO Engine Oil Extractor Pump Brake Fluid Extraction Syringe Vacuum Filling and Extracting Pump Capacity 500CC

https://a.co/d/ixjMHvm

Mike

[Rup91]

If you don’t remove the support, its going to be tough to bend it with the limited space. I bought very thin tubing to see if it works better.

[F10Mfizzy]

Originally Posted by Aronis

I used this and bent the tubing to the shape I needed. Worked great.

SMOTIVEPRO Engine Oil Extractor Pump Brake Fluid Extraction Syringe Vacuum Filling and Extracting Pump Capacity 500CC

https://a.co/d/ixjMHvm

Mike

Thank you for getting back to me. I just purchased it will give it a shot tomorrow! Did you change the trans fluid yet?

[Aronis]

Originally Posted by F10Mfizzy

Thank you for getting back to me. I just purchased it will give it a shot tomorrow! Did you change the trans fluid yet?

I plan on it probably in the fall. I'm not a believer of the LIFETIME transmission fluid BS. LOL. I helped a friend do his 335 last summer, pretty similar I am sure.

Mike

[Aronis]

Originally Posted by Rup91

If you don’t remove the support, its going to be tough to bend it with the limited space. I bought very thin tubing to see if it works better.

After doing it once on my car and then helping a friend rebuild his transfer case, I am pretty sure you can get at that without removing the support, but really it's not that big of a deal to remove the support.

Mike

[Rup91]

Originally Posted by Aronis

After doing it once on my car and then helping a friend rebuild his transfer case, I am pretty sure you can get at that without removing the support, but really it's not that big of a deal to remove the support.

Mike

Did you have anything supporting the trans when you removed the support per the BMW manual? Not sure if anything will fall on me once I remove the support

[Aronis]

Originally Posted by Rup91

Did you have anything supporting the trans when you removed the support per the BMW manual? Not sure if anything will fall on me once I remove the support

I just used a jack.
Car was on QUickJack.

Mike

[19M5]

Originally Posted by Demon Barber

Rear diff requires exactly 1 liter of Hypoid G4 fluid, part number 83-22-2-447-362. Apparently, filling to the edge of the fill plug would be overfilling. I plan on doing my front and rear diff, transfer case, and transmission fluid changes myself this spring. Already purchased all the materials.

As an fyi, I changed the rear myself and it required 2 liters

[Demon Barber]

Originally Posted by 19M5

As an fyi, I changed the rear myself and it required 2 liters

Then you overfilled it by an entire liter. The instructions specifically say that if you fill to the edge of the fill plug, the rear differential will be overfilled.

[pbonsalb]

Originally Posted by 19M5

As an fyi, I changed the rear myself and it required 2 liters

Maybe you bought 500ml bottles and it took 2?

[19M5]

Originally Posted by Demon Barber

Then you overfilled it by an entire liter. The instructions specifically say that if you fill to the edge of the fill plug, the rear differential will be overfilled.

Nope. 2 liters came out of the rear axle; and I put 2 liters in. I personally drained it and personally put in the 2 liters.

[19M5]

Originally Posted by pbonsalb

Maybe you bought 500ml bottles and it took 2?

That could have been.

[pbonsalb]

Most likely if you put back what you took out, tge jevel hs fine—unless someone else overfilled it previously. I did not put a camera in there to see what the level is before the fill port. I tend to think it would not hold an extra liter but have not verified that.

[Demon Barber]

Originally Posted by 19M5

Nope. 2 liters came out of the rear axle; and I put 2 liters in. I personally drained it and personally put in the 2 liters.

You might want to check the volume on those bottles. If you actually got 2 liters out of the rear diff, it was overfilled. You can always call your dealership parts department and ask for rear diff fluid capacity to confirm.

[micvite]

Originally Posted by Aronis

I just used a jack.
Car was on QUickJack.

Mike

What year is your car? I just got back from dealer where ista says for my 2023 it's 1.4L for rear diff lol... I think diff years may have different diffs maybe?

[Aronis]

Originally Posted by micvite

What year is your car? I just got back from dealer where ista says for my 2023 it's 1.4L for rear diff lol... I think diff years may have different diffs maybe?

2018.....

Mike

[micvite]

Originally Posted by Aronis

2018.....

Mike

So either your pdf is wrong, dealership is wrong (which I can see) or you have a different diff lol lemme look up part nrs..

[micvite]

Originally Posted by Aronis

2018.....

Mike

To confirm 2018-2020 has a different diff than 2020 onwards, though replacement diff fits 2018-2023 cars. They fazed out the old one so if u ever replace it just keep in mind different fill amount😅

[Demon Barber]

Originally Posted by micvite

To confirm 2018-2020 has a different diff than 2020 onwards, though replacement diff fits 2018-2023 cars. They fazed out the old one so if u ever replace it just keep in mind different fill amount😅

Are you saying that the new diff takes twice the volume of fluid than the old one?

[micvite]

Originally Posted by Demon Barber

Are you saying that the new diff takes twice the volume of fluid than the old one?

Apparently new takes 1.4l old takes 1l so just another 40% more