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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N47 and N57 Turbodiesel Engine / Drivetrain / Exhaust Modifications > Changing oil in ZF gearbox - Static or Dynamic?
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      05-31-2019, 12:43 AM   #1
Johny212
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Changing oil in ZF gearbox - Static or Dynamic?

Hi there,

What are your experiences with changing the oil?

It is better to change it static ( normal draining the oil & filter replacement with new oil) + new adaptation - around 70% oil is changed

Or the dynamic method - connect the machine to hot gearbox, lubrication system is cleaned with cleaning agents (added to the old fluid). Then push the used fluid out with the pump while introducing a new one.
&Replacement filter + new adaptation - 100% oil is changed
-around 2 bar by machine


There are many opinions - dynamic method of replacement is bad coz of mechatronic in gearbox...bla bla
I know 3 people for now who changed oil in Exx gearbox with over 130k miles and the gearbox is working better - the gearbox dragging gears, sometimes was jerking while changing gear ( I know its not ZF)

I am still thinking which method of changing to choose in my ZF 8HP50

I've got 95k km for now, ~60k miles
Especially on cold engine I noticed the gearbox dragging gears, even on hot sometimes. Also sometimes you feel a gentle tug when changing gears.
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      05-31-2019, 08:17 AM   #2
oceanview
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I would go with the manufacturer recommendation for the specific gear-box.
https://aftermarket.zf.com/us/en/aft...on-oil-change/
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      06-08-2019, 04:27 PM   #3
rbreding
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No need to go to all that complication. Just drop the mechatronic and 95% of the fluid will come out. While you have it dropped replace the tube and bridge seals.
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      07-23-2019, 01:27 AM   #4
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I think as above stick to static method. The Dynamic method would dislodge dirt/metal and brake the box.

I have changed oil in a ZF box and it's relatively straight forward and need follow very carefully.
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