I've just finished performing the window gear bushing repair procedure on my B2. After years of pulling my window up with a piece of tape, the driver's side window now functions perfectly, at a cost of almost nothing. (GREAT POSTING! - Thank You "stinger")
I thought I'd add to this thread a couple of potentially helpful tips. Removing the old grease full of broken pieces of plastic inside the gear assembly, and inserting the 1/4" nuts as described above was fairly straightforward. The trick is getting the darn motor out!
To remove just the window motor rather than disassembling the entire window mechanism (which I think is a MUCH easier approach), I drilled three holes in the inside door panel metal to give me access to the three bolts that hold the motor/gear drive on to the up/down assembly, which is riveted in place. I first marked where I thought the three bolt heads were located, then drilled three 1/4" holes, followed by three 1/2" holes. These half inch holes were big enough for me to use a 1/4" ratchet through, and removal of the motor was easy once the holes were drilled. (Because I sorta missed on one hole, I had to widen the hole somewhat with a grinding tool.) I have included two images here. The first is of the holes in the door panel that I drilled to gain access to the motor bolts. As these were not perfectly aligned with the holes (but close enough to work), I recommend not using their placement on the panel in this image as locators for your own holes. You can porbably do better. To help with this, I've included an image of the gasket from the back of the motor/gear assembly which shows the bolt pattern exactly. If you download and print this image sized at exactly 4" x 4", it can be used as a template for drilling the three holes.
The 3 screws that attach the door handle to the door have 7mm heads.
The 3 motor/gear assembly bolts are 8mm.
Remember to tape your window in the full up position before you begin to work on your window assembly.
The replacement procedure is very sensitive to 1/4" nut size. I had one nut that simply wouldn't work. You might want to have an assortment of different brands of nuts available before starting.
Hope this helps anyone who does this repair themselves.