transmission rebuild on 1997 Porsche Boxster

How do i rebuild a transmission for a 97 porsche boxster? Transmission is ZF5HP19. It is an automatic.

1 answer
I don't know but I have a 97 boxster and the trans just went it only has 45,000 miles on it!!!!! The car is not modified in any way and never been raced. It always had its annual service at the dealer every year. I contacted porsche of N. America and they said they will not help me! I will never buy another porsche!!!!