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			Others can reply about the engagement issue, but don't waste your time or resources changing the trans fluid.  That horse is way out of the barn for a flush to make a difference. 
 
I had an issue with my 08 CSS downshifting from 3 to 2.  It would grind.  While I had the engine out to repair bore scoring, I sent my trans to a shop in AZ to get the 2nd gear synchro replaced.  It was shot.  As he dug further into the trans, he found a tooth on the pinion gear was chipped and then he found the 3rd & 4th gear synchros were past their prime.  I ended up buying a reman trans.  Hope you have better luck with your repair. 
 
Trans guy told me to replace the trans fluid every 10K mi.  I do 2-3 DEs / yr.  10K mi might be a bit of overkill, I'm going to do 15K but that's way earlier than the 50K it had before I changed it the 1st time.
		 
		
		
		
		
		
		
			
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				GPRPCA Chief Driving Instructor 
2008 Boxster S Limited Edition  #005 
2008 Cayman S Sport - Signal Green 
1989 928 S4 5 spd - black
			 
		
		
		
		
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