[Bimmerroad]

I am wondering if I can simply pressure force out the existing Transmission fluid via pressure build up using the Transmission cooler lines, is it possible?

and will the the fluid in the torque converter also be forced out?

Will be simpler to start the engine put in neutral, will the fluid be pumped out and if so would be significantly more than just draining via the the pan's drain plug?


If you have any experience with it, please share.

Thanks

[Bimmerroad]

Answering in part my own question:

It seems one can pump out the Transmission oil via the cooling line.

The line reaches all the way to the radiator, that's where it get disconnect (only the inlet)

after disconnecting one can start the car and the transmission will pump out the fluid.

Other question was raised,

Can I pump most of the fluid without causing damage to the transmission?
Other methods one must replace with new fluid as the old one is drained out.

Thank you for sharing

[n3985]

You should do drain and refill as per ZF's own maintenance guide every 60K miles, yes it is partial fluid change but the manufacturer knows best,