I have a 2012 Flex. I have just hit the 36,000 mark, however, I've had the car in the shop for both these issues, but not fixed yet.
1. When I start the car, back out of a space (or pulling forward from space), after going about 20-30 feet, there is a noise under car that sounds like I am dragging something metal or like the axle is dragging as the wheels are turning. I can feel the vibration of the sound under my feet at the pedals, although the pedals don't vibrate with this. It lasts for only a few feet (no more than 10-20), and then stops. I don't have it again, until it has been parked and I leave again. It doesn't have to be parked long (but I only notice when the vehicle has been off then turned on). For instance, I have parked at the Dollar Tree, ran in, only to find they didn't have what I was looking for, get in the car, crank, pull into drive, take off, and it happens again. I have tried to pay attention to the speed, and I am not "gunning" it. I notice it before hitting 20 mph.
2. I hear this sound at the engine that sounds like a ticking (I've described it to my husband and the mechanic as the sound of the wheel on wheel of fortune where the flapper hits the bars or the sound of a leaf stuck in a fan blower) but this only happens after you hit 2500 rpms. It will continue until the rpms fall below 2500. I have noticed it with and without the air conditioning on. Mechanic and hubby hear it only when they have the hood up, and I have my foot on brake and rev the engine. I hear it inside the car. A belt has been replaced, although I don't remember which it was, but something to do with the power steering maybe? Anyway, I know that the belt has no tensioner (sp?) on it.
Any ideas for either is greatly appreciated!