I have had an 2001 Arosa 1.4 16V sport since 2011 and the speedo has died, it was erratic for a time and then completely died.
I have checked the speedo drive gear which goes inside the gearbox and the spindle is rotating in an erratic fashion, it turns and stops for a second etc, if I put my finger on the exposed top I can stop it from rotating completely with a tiny bit of pressure, you can feel it bite sligtly and then slip. This was a recon gearbox back in early 2013. I have removed the drive gear, see attached for what it looks like (no damage that I can see) although there is very slight scoring on the end as you can see. I'm guessing the nylon gear on the final drive ring gear has worn away? How much of a ball ache is it to split the box on these and is it worth it? Thanks for any help.