Product review (5 stars): Stopped squealing dryer completely - now quiet
The wavy metal washer goes on the dryer spindle first, then the drum roller, then the beige fiber washer, then the snap ring.  You are then done.  The dryer drum does NOT need to be completely removed from the machine in order to access the two rollers (and yes replace them both) you will be replacing.  Simply lift the drum up and forward towards you slightly until you see the rollers, then gently lay it down in the dryer.  When you have replaced both rollers, just gently lift it back up and back onto the felt at the back of the machine.  Check the drum belt to make sure that it is in the running position, which is 2 inches in FRONT OF (towards the front dryer door) of  the mounting groove on the dryer drum, SMOOTH side of belt down.  If the belt has slipped into the groove, pull the belt out of the groove towards you and on to the drum.  The spindle, although it is supplied, should not need to be replaced unless yours is badly grooved.  If it is slightly scratched, gently sand it with some very fine sandpaper or emery cloth&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/EZ-FLO-45205-Waterproof-Emery-Cloth-Blue/dp/B00838J94O/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">EZ-FLO 45205 Waterproof Emery Cloth, Blue</a>&nbsp;, then clean the spindle thoroughly with a rag and rubbing alcohol.  Clean the dryer spindle thoroughly before mounting your new drum roller even if you do not sand.  DO NOT lubricate the spindle at all, it should be clean and free of debris.  To get the old snap ring off of the spindle, use a flat tipped screw driver and pry it off - you will not be using it again.  Also, the snap ring supplied with the assembly bends easily, and then does NOT snap back closed well (it needs to be very tight) - I recommend&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/300-Piece-Snap-Ring-Shop-Assortment-18-Sizes/dp/B000K7GREQ/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">300-Piece Snap Ring Shop Assortment - 18 Sizes</a>, and I used one of these snap rings instead of the one supplied, as they are much sturdier and the holes are big enough to accommodate the tip of a snap ring plier which you must have, or else the job will be a mess.  Use the one supplied as a guide to select one from the other assortment I mentioned, that way you'll know which size to use (use it as a template).  I purchased this snap ring plier set a year ago&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/TEKTON-3576-Internal-External-Snap-Ring-Pliers-Set-4-Piece/dp/B000NPR2P8/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">TEKTON 3576 Internal / External Snap Ring Pliers Set, 4-Piece</a>&nbsp;and I have used it quite a bit in addition to the snap ring set assortment.  My 21 year old Maytag dryer now runs like new and is perfectly quiet.  Before, it was squealing horribly, and lubricating the rollers will do absolutely nothing - it stops the noise for awhile, and then it comes right back.  The wavy metal washer supplied is exactly the same used by Maytag when I bought the dryer, and I would stick with the wavy metal washer as supplied in this kit.  The wavy metal washer lasted 21 years.  Also, keep your older dryers and washers, especially if they are Maytag, and fix them up.  They will last for at least another 20 years, as the tubs were made of steel, and now they are plastic.  Simply write the model number from your machine on a piece of paper, type just the model number into Amazon, and click search.  Most of your parts needed will come up, with their pictures.  This company also had this part assembly to me in only 3 days.  A wonderful experience all around.