From my incorrect ordering of parts, I have found that the usual ODO gear being replaced has 29 teeth for the KPH version, and 21 teeth for the MPH version. Unfortunately, my old one has 32 teeth (1980 Euro S with KPH only speedo). Does anybody know if the correct 32 tooth gear is available? The "teeth" I'm talking about engage the middle gear in the train.

 

I got mine from roger, call him tuesday he will know.

 

Here is two different suppliers of 20 x 32 gears:
http://www.klaindustries.net/odogear/gear.htm
http://www.odometergears.com/product...28Non-US%29/79

 

Thanks Mattias - some good info on those links!

 

Al,

My `80 speedo is clearly marked in MPH and there would be no reason to believe that it would have anything but the MPH gear in it. A month ago I took it all apart and found that it needed the KPH gear. Crazy me, I had bought the MPH gear.

Roger and I talked about the problem and he sent me out the KPH gear and it fit fine. Once it was back together all was fine and it indeed reads in MPH. Roger indicated he had seen this before and he said he believed that there is also a calibration screw somewhere in the unit that has a broad enough range that the unit with a KPH gear can be adjusted in read in MPH.

All I can conclude is this is like everything else on cars. Just because you have a part number and manual that identifies the part as being in your car, it does not mean that your car has that part.

 

There was another case in Australia where an 87 had a different gear to the two normally recognised gears. Nothing ever susprises me on these cars.

 

Joe,
I was vice-versa for mine, and Roger did his usual awesome service and traded me the MPH gear (note - I did not verify the # of teeth before ordering the gear - DOH!). I will continue my email with Roger to get the 20 x 32 gear. It was apparently used on the non-US 928 and early non-US 944 - according to one of the links above.