Maytag neptune dryer has a very loud squeaking noise during the entire drying cycle

ALWAYS UNPLUG YOUR DRYER BEFORE STARTING ANY REPAIRS
Your problem sounds like drum rollers have flat spots on them or in need of lubrication. Check your drum rollers for flat spots or wear, if they have flat spots or wear on them replace them. If the drum rollers don't have flat spots or wear on them then they probably only need lubrication. Lubricate the shaft of the rollers with a good grade of machine oil such as 3 in One oil. Reassemble the dryer, plug back in. This should solve your noise problem. I will include these two websites for parts and further help: http://www.partselect.com/ http://www.appliancepartspros.com/index.aspx Both also have chat assistance 24/7. Good Luck, I hope this helps Please rate me, Thank You