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I have a 2001 911 Carrera with a Tiptronic trans. Porsche has 52,000 on her and runs great. The issue I am having is when it shifts the engine rpms go up between gears even thou I’m holding the accelerator pedal steady. I notice more going up hill or just a slight grade. I’m new to this site and any help would be appreciated. This is my 1st Porsche so I’m not real familiar with the characteristics of this Transmition.

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  • 2 weeks later...

I had the same symptoms on my -99 911 C4 Cab that I bought this past January and they were resolved with a full service on the transmission. My car had 99,500 miles on it and service invoices going back to 2003. I looked through them all and found no mention of the transmission ever having been serviced properly. According to Porsche it should be done at 90,000 miles so it was already overdue. The difference is night and day, and the transmission now shifts smoothly with no slipping or strange revving happening. I have read on other forums that the transmission may need to be serviced before the 90,000 mile mark, it really depends on how it has been driven. If you're not sure if your car has ever had this done, I would recommend you do it and see if this fixes your issue. I went with a local independent shop that specializes in luxury cars and that has a Porsche certified mechanic on staff. A full service is not really a DIY job in my opinion as you'll need to replace all liquid in the transmission and flush it clean using some specialized equipment. In my case it cost me $480 + tax, well worth it.

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