hi mate, well I ad an e39 bmw auto, & that done same thing then jamed in 3rd I add in gearbox centre he seid ma be selunoud ,,not sore if I spelled that correctly,,enyway it wasent that in the end gearbox was jamed block seid due to wear ma be a lot of towing or sport mode abuse, subaru autos are up there with the best.i was told by a subaru machanic that the auto box as about a 10 yr life span.when I got my car 1st thing I ad done wsd oil & filter on auto box its a must.you might be looking at another box in it eadyer then getting old one fixed