[hun77777]

i would love to replace tranny fluids and differantial fluids since i'm approaching 50k does anyone knows part numbers for those?
i personally don't buy stealership claiming "lifetime" on those fluids...

also any other maintenance that i need to be aware of other than oil change, filters, spark plugs, brake pads etc?

[Bcube]

Here is my experience with finding fluid for the rear diff.

BMW Part Number:
BMW OSP Synethetic differential oil / PN 83229407768 / Container: 55-Litre barrel. So that didn't work.

What else?
BMW Expressly approved hypoid oils:
A page long list of European manufactures, but one particular stands out due to my BMW motorcycling days:
Castrol SAF-XO.

Now where to find? It isn't a normal North American import.
Well what do you know: Land Rover part number LRN7591 sold in individual quarts. And this is what I ended up buying at the local LR dealer.

Data confirmation:
LRN Fluid part numbers:

[hun77777]

Originally Posted by Bcube

Here is my experience with finding fluid for the rear diff.

BMW Part Number:
BMW OSP Synethetic differential oil / PN 83229407768 / Container: 55-Litre barrel. So that didn't work.

What else?
BMW Expressly approved hypoid oils:
A page long list of European manufactures, but one particular stands out due to my BMW motorcycling days:
Castrol SAF-XO.

Now where to find? It isn't a normal North American import.
Well what do you know: Land Rover part number LRN7591 sold in individual quarts. And this is what I ended up buying at the local LR dealer.

Data confirmation:
LRN Fluid part numbers:

thanks a lot for your response. how many quarts did you need? it says package of 2 quarts. do you remember roughly how much it was?

also anybody has any finding on transmission fluids?

[Turkeybaster115]

Originally Posted by hun77777

thanks a lot for your response. how many quarts did you need? it says package of 2 quarts. do you remember roughly how much it was?
also anybody has any finding on transmission fluids?

Do a search! Both fluids have been discussed on this forum, at length.

[Bcube]

Originally Posted by hun77777

thanks a lot for your response. how many quarts did you need? it says package of 2 quarts. do you remember roughly how much it was?

also anybody has any finding on transmission fluids?

~$13 a quart.

If yours is a 335i, the diff takes 1.2 Liters. And you will need a short 14mm hex head (socket driver) to undo the fill port. The craftsman socket driver was too long, which means some stuff will have to come off behind the diff. (or maybe not, I have an E93, so there is some extra structure bracing back there). Anyway try find a stubby hex driver or cut down a long one, life will be easier and one can use a torque wrench (60nm) to re-insert the plug within the limited space.

The port is for fill. There is no drain plug. You are going to have to suck/vacuum out the fluid. Or take off the rear cover. I went with extracting the fluid with a hand pump. Like the ole way of sucking engine oil fluid thru the dipstick tube , it will be difficult to know if you have gotten out of the fluid, but you should be able to get most of it.

Oh yeah, it appears that the fill port is about at the 1 liter level. Indeed, the TIS says to put fluid in until it starts dripping out the hole. OR follow the recommended amount called out by such and such chart. N52 cars take 1 liter, N54 takes 1.2. So do some measuring before hand. And you may have to raise the rear higher than the front to get the other .2 liters in.

Have fun, and don't be afraid to swear at the car when you are working on it. I try to learn a new german cuss word to practice before working on this one. BMW AG really doesn't want you (or it seems even a factory-trained tech) to work on these cars.

[raceyBMW]

Tranny fluid is "Shell M-1375.4 transmission fluid", will run you about $20 a quart.

[hun77777]

Originally Posted by Turkeybaster115

Do a search! Both fluids have been discussed on this forum, at length.

link?

Originally Posted by raceyBMW

Tranny fluid is "Shell M-1375.4 transmission fluid", will run you about $20 a quart.

thanks!

[raceyBMW]

There is also this stuff...
http://www.rmeuropean.com/Part-Numbe..._9BA48850.aspx

[hun77777]

Originally Posted by raceyBMW

There is also this stuff...
http://www.rmeuropean.com/Part-Numbe..._9BA48850.aspx

thanks. did you actually did it? how many quarts did you actually use it for drain and fill. some said 7 quarts, some said little over 9...

did you have to change filters too or just drain and fill?

[raceyBMW]

Nope, haven't done it yet...just doing research like you. I am at ~27k miles, not sure if I want to do now or at 50k. I will not be changing the filter now though, probably do that at 100k.