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.

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. ;)

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.

wait a minute- we're not used to easy fixes around here...:eek:

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.

I had mine done while getting the new LN IMS installed.