Is transmission oil complete flush possible with extractor pump?

serkange · Dec 4, 2018

Dear All
Hello.

I have a TD4 Freelander 2006.

There are much topic in this site about transmission oil change.Mostly conventional method.Open drain plug and fill up same quantity from filler plug.Check level when it comes 40-45 C. temprature.

I have seen too much youtube video (mostly for GMC,Ford or chevy trucks) using complete flush method with 12v portable oil extractor pump.They are using transmission oil cooler feed and return lines.It seems like dialysis machine.Oil oil comes out and new ATF fluid going back until sight fresh oil on feed line.Mostly used 10 or 12 liter new atf fluid.

I am adding a few photo and freelander oil cooler.
I kindly ask your opinion.
Is this possible for TD4 freelander or cause any damage ?

Thanks in Advance

Nodge68 · Dec 4, 2018

I'm not a fan of a total fluid swap, especially in old and worn auto boxes. In time the clutches wear and don't grip so hard as when new. The fluid slowly fills with microscopic clutch pack particles. These suspended particles help the clutches grip, which is just what's needed in a worn transmission.
Now imagine replacing all the fluid using the intravenous method. Suddenly the mildly abrasive particles are gone and there's nothing to help the clutchs transfer the drive. This leads to slip and flaring on the gear changes, which burns the fluid and what remains of the clutches.

So I personally don't do a full fluid change on an older transmission and wouldn't recommend it either.

It's far better to do 2 or 3 partial fluid changes over a few hundred miles, simply because a good amount of the helpful particles stay in the fluid, minimising clutch slip and fluid burning.

serkange · Dec 4, 2018

Nodge68 said:
I'm not a fan of a total fluid swap, especially in old and work auto boxes. In time the clutches and don't grip so hard as when new. The fluid slowly fills with microscopic clutch pack particles. These suspended particles help the clutches grip, which is just what's needed in a worn transmission.
Now imagine replacing all the fluid using the intravenous method. Suddenly the mildly abrasive particles are gone and there's nothing to help the clutchs transfer the drive. This leads to slip and flaring on the gear changes, which burns the fluid and what remains of the clutches.

So I personally don't do a full fluid change on an older transmission and wouldn't recommend it either.

It's far better to do 2 or 3 partial fluid changes over a few hundred miles, simply because a good amount of the helpful particles stay in the fluid, minimising clutch slip and fluid burning.

Dear friend thanks a lot
lesson learnt
So I am going to change partly 2 or 3 times with classical technique
No need extra issue
Best Regards

Is transmission oil complete flush possible with extractor pump?

serkange

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