I just had my 2007 Outback with manual transmission, 107K repaired. I took it in because of a whining noise that typically correlates with central differential bearings. No other symptoms. The Subaru dealership replaced the bearings, the central differential, and the gears.
Upon picking the vehicle up, I asked to inspect the old parts with the mechanic. The only visible damage/wear was to the bearings as noted by the mechanic. The gears looked good. The differential had some signs of heat coloration. The dealership said they replaced all the above parts because of the mileage and to prevent a return visit. The mechanic pointed out the heat marks, and stated that often after a repair of just the bearings, he finds other components may not match up(gears). The end result being I would have it back soon for another repair. While I partially agree with his logic, I have a hard time replacing parts with no damage.
Should I be appreciative of this preventive maintenance, or was I taken for a ride?!
Thanks for you insight,