I spent a few hours researching the transmission oil for the '99 before I changed mine.  Porsche really went all out on the early five-speed's and the oil is in fact specific to the transmission.  It's a shame most dealers will try to sell people the wrong fluid, because they don't stock the 20L drum.  Don't trust the parts guy at the dealer!
	Quote:
	
	
		| 
					Originally Posted by Vidyashankara  Awesome, thanks! Can you explain the potential alignment issues? 
 The hole will give access only to the drain plug right? I am not sure if i can access the fill plug without remove the tray.
 | 
	
 
The plate is part of the suspension system, it acts as a brace between the rear suspension, and when you remove it, you can change the alignment of the car.  If you choose to remove it and not drill a hole, use jack stands and not ramps.  By taking the weight off the wheels you will reduce the chance of messing up the alignment.  When I removed the plate I used stands, and when I had my alignment checked afterward it had not been affected. 
