On a 1998 Subaru Legacy station wagon (not the Outback) running stock tires and suspension, with a 5-speed manual transmission: I've been getting a vibration/droning at around 70mph +/- 3 or 4 mph. The problem occurs in gear and out of gear. A knowledgeable relative suggested it could be a warped or damaged rim that might have evaded tire replacement/balancing a year ago. My wife was in a fender-bender a year and a half ago that required some front-end parts replacement along with a blown front tire.
The dealer couldn't find the cause of this 18-month old problem. Any suggestions?