There’s no cut and dry rule for how often you should bring your vehicle in for a transmission flush. Every vehicle is different and every transmission ages differently, primarily based on how it’s driven. In general, transmission issues develop later in your vehicle’s life and remain a concern until you retire it from the road. Every 30,000 miles or two years is a general rule of thumb, and our technicians will discuss with you whether that suits your vehicle. For vehicles with transmission issues, it could manifest itself in many different ways. There are five common signs you may begin to notice if your vehicle needs a transmission flush.