Do not lubricate the roller shafts or idler wheel bushing because you'll just attract link build up and they'll fail prematurely. Simply clean the shafts thoroughly with a clean shop towel and install the new drum rollers.
Damn. That's why I axed the question. I'll clean it up when I get the maintenance kit to get the 3-in-1 off the shaft.
Have you bypassed/held down belt switch and tried to run this unit in air dry cycle to let the motor run without a load.
There's a good chance it you let it run for a while you will find the squeal is coming from the motor bearings/bushings.
I see more motors go out in this style Whirlpool built dryer then any other I can think of!
I am also concerned that the maint kit won't actually solve it. I definitely want to find this out sooner rather than later. Is there a way I can do this just by removing the lower front panel? I can do it but I need some good guidelines I am not sure how to bypass the switch.
If it is the motor, is that available @ repair clinic?
Last question ... if it is the motor, from what you're saying, is there anything I can do about it, or do I just need to figure that I will just need to replace the damn motor every few years? Not sure if there's any maintenance that would extend the life or if it's a design/manufacturing thing on the motor itself.