1999 Boxster slips going into 5th tiptronic

[todds99]

Thanks for all the help guy's it has only happened once.It just had me a little concerned.Looking at the paperwork the trans fluid and rebuild was performed 14 grand ago.This weekend i will check the fluid.Should it be changed?Can the fluid be bought locally and what type?Im waiting on my manuals..I will also check that vacum valve.