What could cause all wheel drive on 1995 Subaru Legacy not to work?

Answer 1

The short answer is likely not properly maintaining the transmission. The Subarus run hot and breakdown the transmission oil. If they're not properly maintained the transmission can start to have problems quickly. The car probably will tell you what the problem is if you run through the self diagnostic system. This will trigger the car to blink a code on the dashboard which will narrow down the problem. There may be a cylinoid in the transfer case that has gone bad that moves the car into and out of four wheel drive. If one of the cylinoids goes bad, it can cause the vehicle to stay in four wheel drive when you don't want it or not go in four wheel drive when you need it. Your best bet is to take it to a transmission specialist, as opposed to a typical auto mechanic.