A humming or whining noise from your Exeed RX gearbox at highway speed is usually a warning, not just road noise.
Here is what to check first and when to stop driving.
What That Highway Whine Usually Means
On an Exeed RX, a hum or whine that rises with road speed and comes from the transmission tunnel is often gearbox-related. It can be as simple as low or degraded transmission fluid, or as serious as worn bearings, gear teeth, or final-drive components. Because the RX uses a dual-clutch or automatic transmission depending on market, the noise may come from the gearbox itself, the transfer case on AWD models, or the rear differential. Tire roar and wheel-bearing hum can sound similar, so a proper road test is important: note whether the noise changes with gear, throttle, or steering input.
