I have a squeaky dryer and thought that I had fixed it by replacing the rear drum bearing kit and getting a new belt. Once I had put all of that on and reassembled the dryer the thing still squeaks. Any suggestions?

I do not know the model you have, but the rollers and the belt tensioner can squeak if not greased with white lithium grease. Try spraying different spots with WD-40 until it stops then you will know which one needs replacing or greasing. The rollers are cheap and they wear out.