Boxster S Transmission Failure... Help?

[Raphael Gergi]

Well, I have a Porsche Boxster S 2003MY with a Tiptronic S transmission.

The issue started 2 months ago when the car was being driven very smoothly and suddenly one day an Emergency Tiptronic Mode on the 4th gear appeared, I turned the car off then on again and everything seemed normal. Nevertheless things started getting worse ever since that day (of course I had changed the transmission fluid), until what the problem is right now.

When the car is turned on, after a long night sleep there is no way the shifter would shift, as you know the car drives off with 2nd gear, while it appears on 2nd gear on the dashboard it actually is being driven on 1st gear, so I basically have to keep on trying to drive it around the house for around 15-20 mins so that the car would heat up for the transmission to work normal again... So basically the car cannot be driven on a cold start.

Also, the 5th is always slipping.

So as I suppose the transmission is dead? can it by any chance be rebuilt? or I'll have to go into a 3-4k $ issue to buy another transmission?