Should the transmission fluid be changed on a 1998 Boxster?

[bill945]

Hi!

This is my first post and I hope that someone can help me with a question regarding my 180k service.

I'm the original owner of a 1998 Boxster, almost at 180k miles, tiptronic, all scheduled maintenance done on time.

My Porsche mechanic gave me the option of not changing the transmission fluid because:

a) At 180k, the transmission is beyond it's life expectancy
b) The clutches are probably worn down and when that happens it's most happy with the old fluid because with new fluid there's a small chance the transmission will not like it and start slipping.

So the question is change the fluid and take the chance it's going to start slipping or leave the old fluid in?

Thank you for any insight!