Tiptronic transmission oil change

[Walshie]

I am planning to do ATF and filter change in the next few weeks but I am getting conflicting views on ATF quantity. The manual states the car ( 2.5 Base) requires 9.5 litres but I have heard people saying that even if you drain down you only need 4 litres to the fill. Has anyone performed this change and tell me the quantity used
Thanks

[911monty]

Originally Posted by Walshie

I am planning to do ATF and filter change in the next few weeks but I am getting conflicting views on ATF quantity. The manual states the car ( 2.5 Base) requires 9.5 litres but I have heard people saying that even if you drain down you only need 4 litres to the fill. Has anyone performed this change and tell me the quantity used
Thanks

Walshie; I do not have a Tip, but as with all auto transmissions, you will only drain what is in the sump. The torque converter will not drain. So I would think the 4 liters is probably pretty close.

[JFP in PA]

You will typically get less than half of the total capacity out during a gravity drain.

[Smallblock454]

Hello Walshie,

i also have an MT, but i have a workshop manual. This says a new filling with converter is 9.5 litres and the change quantity is only 3.5 litres.

So if you want to chenge the complete AT fluid i would recommend to do it with a special system that is able to change the complete fluid in the system. There are different systems out there. For example a german system made by Tim Eckart that also uses a cleaner to clean the complete system and then flushes it. More infos: Englisch

Regards, Markus

[JFP in PA]

Originally Posted by Smallblock454

Hello Walshie,

i also have an MT, but i have a workshop manual. This says a new filling with converter is 9.5 litres and the change quantity is only 3.5 litres.

So if you want to chenge the complete AT fluid i would recommend to do it with a special system that is able to change the complete fluid in the system. There are different systems out there. For example a german system made by Tim Eckart that also uses a cleaner to clean the complete system and then flushes it. More infos: Englisch

Regards, Markus

That system, like many others, will not work on the Tip because it connects via the transmission cooler lines, which the Tiptronic lacks (it has an integrated oil to coolant heat exchanger that is part of the transmission, so the are no transmission fluid to cooler lines, only external engine coolant lines).

[Luv2Box]

Originally Posted by JFP in PA

That system, like many others, will not work on the Tip because it connects via the transmission cooler lines, which the Tiptronic lacks (it has an integrated oil to coolant heat exchanger that is part of the transmission, so the are no transmission fluid to cooler lines, only external engine coolant lines).

What is the method to flush the torque convertor and is it necessary when changing the fluid?

[JFP in PA]

Originally Posted by Luv2Box

What is the method to flush the torque convertor and is it necessary when changing the fluid?

The only way to flush out the converter (without removing the transmission from the car) is repeated fill, run, and dump cycles until the draining fluid is clean.

[Luv2Box]

Originally Posted by JFP in PA

The only way to flush out the converter (without removing the transmission from the car) is repeated fill, run, and dump cycles until the draining fluid is clean.

So is it necessary to completely flush it or does the new fluid balance out the old fluid or does the filter catch enough to make a difference?

[Smallblock454]

Originally Posted by JFP in PA

The only way to flush out the converter (without removing the transmission from the car) is repeated fill, run, and dump cycles until the draining fluid is clean.

OK, that is bad news. So you can only dilute the ATF. And if you have a volume of 9.5 litres and only get ould approx. 3.5 litres that is a never endng process.

Mercedes also had this lifetime filling ATs. In 2008 or 2009 they decided to bring back drainage bolts on the torque converters, because the lifetime didn't work and the cab drivers were really pissed by broken ATs. Hope the lifetime filling works better on Porsche AT.

Regards, Markus

[tonythetiger]

FWIW, I used this:

https://www.amazon.com/Pentosin-Long-Life-Fully-Synthetic-1058206/dp/B00JMAQ0LW

[Rayrevolver]

Originally Posted by tonythetiger

FWIW, I used this:

https://www.amazon.com/Pentosin-Long-Life-Fully-Synthetic-1058206/dp/B00JMAQ0LW

Both this link and the one on the previous page go to ATF6. Is that different than ATF1???

Is the ATF6 the correct fluid in 2022?

[tonythetiger]

They are internal hex head screws, and I got them from the dealer, no idea the size.

I have a great relationship with my local Porsche dealer for things like hardware, panel clips and stuff. The time I save makes the price palatable.


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[Rayrevolver]

Necro!

Going to do the Trans and Diff on my 2001 986 Tip.

Question: Can you drill the 2.5" holes in the skid plate to make the next fluid change easier? It would need to be 2 holes for the drain and fill.

Once the plate is off, I can eyeball the locations. Just wanted to make sure this is a reasonable plan.

I think I am going to change the ATF every other year, but want to do 2 changes in short succession. I am at 58k miles and assume the ATF has never been changed, so its like a mini-flush.

[Rayrevolver]

Finally got around to doing this today with the ATF6 Pentosin.

Any idea why it would take more than 5 liters??? I had the car on jacks for a week or so, could more of the fluid drained from the converter and into the pan from sitting so long?

I had to run out to the store to buy a liter for $38 when the 5 liter jug was $75. But at least they had it at Advance Auto so I could finish the job.

The final tally was about 5.5 liters of the ATF6 following the 101 Projects book. I did not mess with the rear differential, but maybe get that down the road.

[Homeoboxter]

Originally Posted by Rayrevolver

Finally got around to doing this today with the ATF6 Pentosin.

Any idea why it would take more than 5 liters??? I had the car on jacks for a week or so, could more of the fluid drained from the converter and into the pan from sitting so long?

I had to run out to the store to buy a liter for $38 when the 5 liter jug was $75. But at least they had it at Advance Auto so I could finish the job.

The final tally was about 5.5 liters of the ATF6 following the 101 Projects book. I did not mess with the rear differential, but maybe get that down the road.

Same happened to me. I ended up with almost 7 liters of ATF, meaning two rounds back to the store, $45 each quart.