5 speed zf manual

[mauro12]

Hi everyone, I would like to ask you what is the procedure to change the oil in the gearbox ( I have the zf 5 speed from factory ). I never changed the oil and I wanted to know how many liters are required and if there is a filter too. Thank you.
Mauro

[Benz Dr.]

No filter and it holds about a liter or maybe a bit more - buy 2 liters. I use synthetic ATF in mine.  Open the fill plug first so that you know you can get it out. I've drained units before only to find I couldn't refill it. I did, but it wasn't fun or easy.
Fill plug and drain are larger than the regular 14 mm used on a MB gear box. 

[mauro12]

Only 1 liter? I thought it was more. To refill do you need a special pump or you can pour the oil directly? It will not fall down for gravity? 75w90 is ok?

[114015]

75w90 is ok?

Hey Mauro!
Huh?
Why don't you listen to Benz Dr. ??
Dan is  one of our Group's two most experienced experts we have here and by-the-way, he has got a ZF 5-speed in his car:

No filter and it holds about a liter or maybe a bit more - buy 2 liters. I use synthetic ATF in mine.

It's ATF oil, not regular gear-box/differential oil.
ATF, nothing else.

See the label  here:


Best

Achim
(04/69 w/ 4-speed)

[114015]

Mauro....,

Here is another one,
an old one...
... if you won't believe me.

Says also "ATF Öl" (= ATF oil)


Achim
(fourspeedpagoda)

[Benz Dr.]

I use synthetic ATF because this unit holds holds a small amount of oil and I wanted all the protection I could get. You really wouldn't want to run a ZF 5 speed low on oil or run it dry.

[mauro12]

Who said that I don’t believe?? You maybe!. I was only surprised about this small amount that’s it .

[DaveB]

..well you did ask whether "75W90 is ok?"...

(I think Achim is just concerned for the welfare of your rare and original transmission  )

[mauro12]

Sorry i didn’t read carefully at the beginning about the ATF oil.. since I bought the car in 2001 I never touched the gear compartment and so never changed the oil. I think now is the right time to do so.