[LarryHughes]

JFP - Thank you for what seems to be excellent advice.
I went to visit my friendly Porsche Dealer's Parts Dept this morning.
They don't stock the manual transmission fluid and told me "just use 75W90".
I explained that I had tried that and the box is virtually unshiftable until it warms up.
He could order it but it would be Monday until it is in.

Since I'm taking a trip this weekend, I turned and asked the Service Manager if he could change the transaxle fluid for me, assuming they would have it in bulk.
Having overheard my discussion, he allowed as how it would be next week since the Porsche fluid would need to be ordered.
I asked what he uses on customer's cars needing service and he said "Mobil 1". WTF? You get Mobil 1 at the Porsche dealer? Will that cause them issues?

I ordered the Porsche fluid ($40/qt) and bit my lip. The Parts Dept guy really didn't seem to want to accept my order.
Then he told me the part number I specified (999.917.546.00) was incorrect as it was for an automatic transmission.
Can you do me a final favor and tell me the correct Porsche number or are the dealer techs just hosed?

I feel like I'm the only guy in the area who has wanted to change his 996 transaxle fluid.
Thanks for being there.