Our 2015 Ford Explorer XLT began experiencing a front end pop a few months ago. It only seems to happen when backing up and then turning the wheel counter clockwise (left). When it happens you can feel it in the steering wheel. It's still under warranty and will be going back soon but I'd like to know what the problem might be ahead of time. They replaced the driver-side front strut mount (I believe) on the 1st attempt, but it didn't fix the issue. I guess they weren't able to reproduce it while on a lift. Probably only occurs when pressure is on the front end suspension. Any thoughts?