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[mkaminski100]

Have you heard about this way of changing gearbox oil? Static method: same as we do it. Dynamic: more complicated, but whole oil can be changed. I was told that it's about 8-8,5 so 3 l more than in static way. It requires oil hose which is going to the radiator, to be disconnected and hole in the gearbox to be closed.  Apart from that it's not necessary to take the oil sump out.  
Has anyone tried the second method?

[Jay w]

never even knew this could be done.......dont know that i would want to try that without the car being up in the air on ramps

[Andy B]

Yes. It's a bugger to change the filter though with the sump pans still on!  
When I did mine, there was a load of crap stuck to the magnet on the sump which would also have remained where it was if you did it 'dynamically'.
You'd still need to get under the car as Vx in their infinite wisdom removed the dipstick from the gearbox!  

[mkaminski100]

yes, you are right, If you want to change oil filter, then you need to take the sump (just the big one), but it's good not because it's easier, but because, you can change oil in whole system, not just in the sump.  
It's called dynamic, because oil is being changed with started engine.
I know that some garages in can do it, but it cost more and you need to buy ca 10 of DIII.

[miggy]

I read somewhere that the auto gearbox oil change should be at approx 60k, what would be the approx cost for this, say at Vx

 :question :question

[Kevin Wood]

An interesting idea, but you still add new oil while the old oil is in the gearbox so unless I've missed something you will still end up with a mixture of old and new oil in the 'box, unless you flush with a load of oil. Sump has to come off anyway, so I'm not sure it's the answer. :-/

Kevin

[miggy]

I read somewhere that the auto gearbox oil change should be at approx 60k, what would be the approx cost for this, say at Vx

 :question :question

Is it so

 :question :question

[Marks DTM Calib]

It wont work because you are diluting the naff old oil in the sump plus the front sump stuff wont get touched.

You would need to do the static version then the dynamic one to get any real affect.

I had thought about using a couple of drums with the output of the rad cooler connected to the first empty drum, a loop tube to the next drum full of fresh oil and a dip tube taking the fresh oil to the gearbox.

The idea being that the old oil pumps into the first drum, the displaced air pases via the loop tube and then forces the fresh oil out of the second drum via the dip tube to the box.....if you had a clear feed pipe you could just keep running it until the colour changed.

[Mike Collins]

This sounds like a system called megaflush. I have had my last two omegas done at Gloucester Road Gearboxes in Bristol. From memory it uses something like 14 litres of fluid.

Done by opening the transmission cooler connections and plumbing to large device with two chambers.

Car is run for a while circulating the old fluid with a cleaner additive into one chamber, then the machine switches supply to the new fluid.

I believe the first part of the new flushes into the chamber that contains the dirty stuff, then gradually fills with new.

The colour of the old fluid certainly looks very different from that in the new chamber.
But as you say, it does'nt change the filter.