LG is responding to the complaints of cracked drums in their entire LG dryer line up by offering a replacement for the cracked drum part for free.
NOTE: This will only apply if you have an authorized LG servicer replace the drum for you. The labor is not covered so you will have to pay for the labor to have the drum replaced. You can call LG customer service at 1 800 243 0000 for more info.
If you hear strange thumping noises when the dryer is turning, it may mean the drum may have a serious problem. Usually the sound goes like this:
Attached below is some pics of a customer with a cracked drum that turned into a hole where we found articles of clothing lost inside the dryer when I took it apart. The customer said that the noise started about a month ago and just got worse and worse everytime they used it. By the time I got to it, they had stopped using the dryer and was hanging their laundry on the old clothes line.