[Johny212]

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.

[oceanview]

I would go with the manufacturer recommendation for the specific gear-box.
https://aftermarket.zf.com/us/en/aft...on-oil-change/

[rbreding]

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.

[ashenfie]

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.