986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - 1999 Boxster slips going into 5th tiptronic

Nine8Six · 10-15-2014, 10:50 PM

Todd

Also had this slipping 5th thing a while ago. There is a vacuum valve that triggers open/close for the cooling of the tip. Located on the driver side right next to the tip/shift rod. This valve was shot (seized) on my car and after my indy here replaced it for a new one ($125) the slipping 5th instantly stopped.

Yours might also be overheating like mine was but as the other fellas here recommended, it's worth ruling out low ATF also

luck mate

10-15-2014, 10:50 PM	#10
Nine8Six Registered User Join Date: Sep 2013 Location: Montreal, QC. (currently expat to Shanghai) Posts: 3,249	Todd Also had this slipping 5th thing a while ago. There is a vacuum valve that triggers open/close for the cooling of the tip. Located on the driver side right next to the tip/shift rod. This valve was shot (seized) on my car and after my indy here replaced it for a new one ($125) the slipping 5th instantly stopped. Yours might also be overheating like mine was but as the other fellas here recommended, it's worth ruling out low ATF also luck mate __________________ ______________________________ '97 Boxster base model 2.5L, Guards Red/Tan leather, with a new but old Alpine am/fm radio.