Motor needed replacing (even though it was only 8 years old!)

In addition to the other helpful suggestions:

The key to replacing the motor is to remove the motor while it is still clipped in to the bracket (after removing the blower assembly, of course.) Don't remove the tumbler and belt thinking it will give you clear access to the rear clip, because it won't.

Removing the bracket is not complicated. There are two screws that are fairly easy to access and keep the bracket in place (refer to parts diagram for location); when the screws are removed, out comes the motor assembly (after disconnecting the wires, of course.) This is the only way to get access to the two clips that hold the motor to the bracket.

As for those pesky clips, I was able to use a flat screwdriver in one hand and vice grips in the other to pry off the clips. After a few tries, working on one end of the clip, I was able to apply quite a lot of downward pressure without braking the end of the clip. If anyone has another suggestion....

Putting the clips back on was much easier. First, remount the motor to the bracket, making sure to rotate the motor to the 2 o'clock position so you can re-attach the ground wire (or else you'll have to unclip the motor again, like I did!) Then re-attach the clip on one side. With the clip aligned properly, bear down with a flat screw driver on the other end of the clip. A swift knock with a hammer on the top of the screwdriver will easily re-attach the clip. Repeat with the second clip.

If you proceed carefully and patiently, this job can be accomplished without specialized tools or expertise.