It's interesting how much people are talking about the bending-down issue and front-loaders. A top-loading washer mostly eliminates the bending, and some of those can have a drier stacked above them (or come with one attached). Maybe the difference is that you're thinking of high capacity and I don't need that. But at least with driers since they're essentially all front-loaders, I think it's just about universal that people WANT it to be up higher and trouble arranging that together with the washer is the only reason they're not all up high like that. At the laundromat I go to, for example, there are two rows of driers, and the ones in the top row get used first. I'm planning for my new house but haven't built yet. There's room for a washer and drier side by side, but I'm thinking of a stacked unit anyway, not just to put the upper half of that space to use and turn the left or right half into free closet space, but also because it's easy that way to have the drier up high and eliminate bending with a top-load washer below. If I stick with separate drier and front-loading washer instead (to save money since the cheapest set is cheaper than a stacked combo), I think I'll build some kind of stage to put the drier up on, at least a few feet tall if not full washer height, just so it isn't on the floor. How flexible is machine location with a given set of pipe/vent connections behind them? Can the connections on the back wall of a closet/room that's wide enough for two machines be set up to accept side-by-side machines, stacked machines on the left, or stacked machines on the right equally well, or would the connections have to be set up for just one machine arrangement that's decided on ahead of time?

Love-love-love our stacked Frigidaire w/d, which is about 4 years old now. Our laundry room is around 6' square at most and when we had the two machines side by side they took up the entire room! It also wasted a huge amount of space above; since I'm only 5'2"ish I couldn't reach more than the edge of a shelf or cabinet mounted above them. So, we had them stacked, which enabled us to hang two nice big (to me anyway, 30x30x12) wall cabinets next to them for cleaning supplies, light bulbs, and such. Rack on the wall for broom/mop/etc. Hooks on the opposite wall for hanging coats, since we have no coat closet. Litter box for a future kitty would go under the wall cabinets, currently cases of dog food are stacked there. It was an ENORMOUS improvement in function for, surprisingly, the house as a whole. There's room enough for a folding drying rack (stored folded) were I so inclined to have one but the VERY few things I have that must hang dry I hang on the shower rod... I make a point of not buying things that must be fussed over like hand washing, dry cleaning, ironing, etc.! I'm "horizontally gifted" along with being "vertically challenged", about 200 pounds, and I bet you I could hang from the top of the dryer without that stacked unit moving at all (and I could almost guarantee you the door would snap off if I tried to hang from that). LOL But if you're nervous about tipping there are these things called "earthquake straps" which are used to secure tall appliances and furniture to the wall (to studs, obviously). The stacking accessory basically bolts the two appliances together so there is no way the dryer's going to slide off the washer. I also have arthritis, back injuries, and little strength in my arms/hands, so I sit on a stool to load the washer down below and don't try to take the wet clothes directly out of the washer to put in the dryer. I sit on my stool, pull the wet clothes out into a basket, put the basket on the stool, and load the dryer from there. If I stand a bit to the side to look up it's easy to read the dial for the different dryer settings and I certainly don't need to do anything like get up on my toes to turn the dial or press buttons. (Top loader washers are a nightmare for me - lifting the wet, heavy clothes at that awkward angle, so painful! My washer spins the clothes so much they are little heavier than dry ones, and if I'm sitting on my stool I'm pulling them straight toward me instead of lifting.) Still needs such niceties as paint, window treatment, etc., but here's my space...

Definitely NOT normal! We have similar LG, also stacked just like yours and no such noise or vibrations. If I have to guess, it either a leveling issue or something came loose! Are they still under warranty? Have it check out right away! Credit card companies usually double up on the manufacturer's warranty time.

@qwert if they're built to stack, there are generally instructions on how to connect them, but the brands we're looking at do more or less sit directly on top of each other, with small connecting kits. If you look at the LG website they should have a manual for your model that will include stacking instructions. I asked about service and our local store said they just ask ahead of service calls if the units are stacked or not, and if they are, then the person who comes out is equipped to take the dryer down if needed, but that the units are designed so that any routine service doesn't require moving them and it's unusual to have to unstack them. (We are looking at ductless electric dryers, so that may make a difference, but even for our existing gas dryer, I have only ever cleaned the duct out from the outside, and have never had to move or get behind the machine.) In 15 years I can't think of any maintenance we've done on our current machines that would have required unstacking them, had they been stacked.