My independent mechanic is getting desperate, looking for bigger $ jobs every time I see him, which was often to seal up all my 07 oil leaks. Now I have a whiny transmission and I'm facing a valve stem seal job. Everything seems to be pointing to getting rid of the 4.8 and getting an '11 or switching brands. Has anyone had the whistling tranny? I'm locate to drop $7500 on this car.

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2010 Specialized Epic Carbon Comp XX
1976 FJ40 Toyota Landcruiser (SOA,350ci sbc V8 crawler)
2007 X5 4.8i
2008 Porsche Cayenne Turbo S