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Thank you for the replies. I'm afraid I can't tell you for sure what procedure they followed to drain and refill the system as I just dropped the car off the indy shop I normally go to for my cars. I'll go and check with them since you got me thinking.
I'm afraid the battery hasn't been disconnected at all prior or after the fluid service. There's another boxster in the same shop with the tranny out (22,000 KM only) -owned by a friend and willing to lend me the valve body while he waits for parts from the states just to see if it will cure my problem. Thinking its a slow solenoid or faulty seal so it cant generate the necessary pressure needed to upshift. Scanned it with a durametric and tiptronic showed no faults. I will post how I get on.
Thanks again, appreciate all the input.
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