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[Doctor Gollum]

Proper cars have TC drains.

[STEMO]

Proper cars have TC drains.

Proper cars?

[Field Marshal Dr. Opti]

IIRC, over half of the ATF is retained in the torque converter. So you will only drain c.3.5 litres of oil first go.
So....in my understanding....first oil change gives a 50% ratio of old to new, second one gives you 75%, third one gives 87.5% and so on. So 10.5 litres of ATF will, more or less, give you an acceptable ratio.

I wonder how much old ATF is left mixed with the new stuff when you drop it in at Bodgit and Scarper service department.

[STEMO]

IIRC, over half of the ATF is retained in the torque converter. So you will only drain c.3.5 litres of oil first go.
So....in my understanding....first oil change gives a 50% ratio of old to new, second one gives you 75%, third one gives 87.5% and so on. So 10.5 litres of ATF will, more or less, give you an acceptable ratio.

I wonder how much old ATF is left mixed with the new stuff when you drop it in at Bodgit and Scarper service department.

Probably 50:50, as you have to run through the gears between each oil change. But 50:50 will still be an improvement.

[STEMO]

I'm sure you could manage it yourself.

[cam.in.head]

as far as i remember there is also a machine that flushes and refills it in one go by pumping new in whilst old comes out ?

[Doctor Gollum]

Proper cars have TC drains.

Proper cars?

As opposed to pretend ones with wwd.

[Field Marshal Dr. Opti]

How do I check the ATF level as there is no dipstick?

I'm guessing you lie under the car and undo certain bolts and she if any 'weep' a little fluid.

Well f*uck that.

[BazaJT]

Don't know where the fill/drain plug are in this application so could be on the end of the 'box and accessible through the wheelarch or you might need to be underneath the car to do it.basically you get things up to operating temperature then with the car level gearbox in park and engine running you remove fill plug and then[as you say]there should be a slight weep if it's up to level.

[Migv6 le Frog Fan]

Assuming it has a gearbox oil cooler - you could take one of the pipes off it, and put a bucket under the end to collect fluid. Then start the engine, cycle through gear positions, while putting new fluid in the box at the same time..
When you have the correct amount of fluid in the bucket, and the fluid coming from the pipe is new, keep filling to the correct level, then job done.
Havent done it myself, but can remember it being recommended on a Mercedes forum a few years ago.
Miay be easier with two people.

[TheBoy]

If you take to a proper gearbox specialist, they will pump the ATF through, putting in new as it extracts the old.  This gets to a near 100% fresh ratio.

But far cheaper to do it yourself a couple of times, but depends on your CBA levels.

[Field Marshal Dr. Opti]

I've found out that the ATF should be changed every 6 years or 50,000 miles.

I've not changed it and I can't find any evidence of it being changed by the original owner(s)

This magnificent beast has now covered 96,000 miles.

[TheBoy]

TBH, if the issue you had was a hydro mechanical issue, you're pissing in a force 9 anyway.  Nothing will fix it.  If it was an electronic issue, that needs resolving.

*BUT* gearbox servicing is part of the car's servicing requirements, so needs doing anyway, unless you think the box is shagged.

[Field Marshal Dr. Opti]

TBH, if the issue you had was a hydro mechanical issue, you're pissing in a force 9 anyway.  Nothing will fix it.  If it was an electronic issue, that needs resolving.

*BUT* gearbox servicing is part of the car's servicing requirements, so needs doing anyway, unless you think the box is shagged.

Changes are smooth as silk......car just refused to change out of 2nd gear. No problem since.....but.

[TheBoy]

And what codes are in the engine and gearbox?