I bought a 05 outback, when you turn it it shutters or grabs, now I have tried to do my research and I come up with 2 possibilities, 1. the center diff 2. the transfer duty solenoid. or am I off on what I've read and if I'm not how do I diagnose for either? Now the story I got from the previous owner is that it started not to long after he went with synthetic trans fluid, Is that possible? I took the car to the dealer and all they will say is it needs a trans and the trans is 7000.00, trans shifts to good and doesn't slip it just has the shuttering problem. Any and all help would be greatly appreciated!!!