Sqeaky noisy Amana Drier

My Amana Gas drier makes a loud squeaking noise, not all the time, about 50% of the timing. Noise starts and stops at random time. Drier starts, runs and dries the clothes fine. Any idea what is causing the loud squeaky noise?

Check out this post. If you find this is your problem then these will be your part numbers you will need. http://forum.appliancepartspros.com/dryer-repair/174797-maytag-squeaking-dryer.html

[part]AP4046756[/part]
[part]AP4291235[/part]

Rear blkhd/seal/cylinder roller/term blk replacement parts for AMANA LG8319W2 DRYER- GAS | AppliancePartsPros.com