serious problem

i have a serious problem stemming from what seemed like a relatively simple problem with my svx.
i started noticing some wheelspin and torque steer that i wasnt used to, so (of course) the first thing i did was go here and check the SEARCH option. i found exactly what i was looking for: the transfer clutch or the transfer control solenoid.
so, i went to a local non-dealer subaru place in my hometown of westbrook, maine and talked to a guy who offered to test drive it. he drove the car out back in a dirt parking lot, did a few starts and stops and came back. to no surprise, he said it was the awd malfunctioning. but, he said, he had never worked on an SVX so to get it fixed i'd have to go to the dealer. so i scheduled an appointment with the dealer. and here's where the problem lies:
after only a few hours of dropping my car off, they call me back and say there's NOTHING wrong with my car. how could that be? im not an idiot, there was something wrong with the car. and i had the opinion of the folks on this site, and of a subaru tech on my side, so i told them to look harder. i even found a message that told a specific test to perform to check transfer pressure and do things with the fwd fuse and so on, printed it out, and gave it to the mechanics to try, and they still said they found nothing wrong with the car. what should i do? it's an intermittent problem, but it's been getting worse. i thought it might be tires, but i had some better treaded ones put on and it still peels like crazy. oh and the reciept (74 bucks thanks for NOTHING) from the dealer reccomends i take it to a tranny shop.

help greatly appreciated,
mike