How to repair your mk1 odometer
There are several threads that describe various ways to fix it:
www.4crawler.com- This was the first link I found on the MK1 FAQ. The entire site rocks, but the odometer writeup was for a much older odometer than I have but gives you what you need to do on most.
http://www.garageprosoftware.com/scirocco/tech_odometer.htm- This was one of the best links with some great photos from dash removal to gear fixing. But since my red gear was okay, this didn't help me with my metal gear.
http://www.vintagewatercooleds.com- Had a very detailed writeup on the disassembly of the speedometer. It had a great suggestion about using tape to hold the number wheels in place.
http://www.drivewerks.com/tech/mult_gauge_repair.htm- This link about Porsche speedometers was interesting because the assembly is kind of similar. It also had the great suggestion about using tape to hold the number wheels in place.
http://www.4130-products.com/step/odometer/index.htm. This is a great site that also mentions the metal gear spinning problem. Although it didn't provide any pictures about the modifications suggested.
http://mysite.verizon.net/janvdb/vw/Body/speedo_fix.txt- Then I ran across this curious link. It mentioned "stamping the hub of the metal gear to shrink the inner diameter. This effectively makes the gear an interference fit on the shaft. This was exactly what I wanted.