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Old 03-12-2015, 09:26 AM   #1
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tiptronic trans like new

changed the filter and fluid in the tiptronic in the 04 Boxster S LE yesterday. The fluid was not burnt, but was very black with a good bit of sludge in the bottom of the pan. No metal at all. Was able to drain out about 4 liters of fluid and replace it.
I have had no problems of not with the transmission (73K miles) but have noticed that it downshifted a bit hard and not as smoothly as before. I guess you get used to gradual change and do not notice it too much or maybe you just expect things to wear and function differently, but when I took it out for a test drive I could not believe how smoothly it shifts and feels. Like a new transmission. Based on the difference I had, I can't believe Porsche waits til 90K to service the transmission.
One of the best $150 I ever spent. Now the C 4 needs it.

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Old 03-12-2015, 09:36 AM   #2
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The Porsche tiptronic is am adapted MB NAG 1 722.6. Until 2005 Mercedes Benz recommended to do ATF oil and filter changes first at 90 K miles. And than no more. They've called it a lifetime fill.

In 2006 they had enough experience with bad transmissions of MB cab drivers. They've changed the ATF and ATF oil filter interval to 60.000 Km. And no longer a lifetime filling.

60.000 Km is 37.5 K miles.

Hope that helps.

Last edited by Smallblock454; 03-12-2015 at 01:02 PM.
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Old 03-12-2015, 10:26 AM   #3
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90K miles is too long for these Tips. Mine started acting up at 74K and I had it serviced and it shifted like new. 60K is the longest I'll go again without servicing it.
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Old 03-12-2015, 11:53 AM   #4
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wait a minute- we're not used to easy fixes around here...
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Old 03-12-2015, 12:47 PM   #5
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my next change will be about 30K more miles since it was so dirty and I was only able to drain about half. Then I will see how it looks and judge future changes.
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Old 03-17-2015, 10:43 AM   #6
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I had mine done while getting the new LN IMS installed.

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