Wrong Speedometer gears.

These are the speedometer gears that came with my (2) transmissions. The yellow 16 tooth gear was in the 280Z 4 speed transmission that came with my car. It is wrong for my 3.36:1 differential, and the speedometer read too fast. The green 18 tooth gear came with in the 1983 280ZX 5 speed transmission that I bought to replace the 4 speed when it broke. It is also wrong for my differential (I think). I ended up buying a 17 tooth gear from Courtesy Parts. (It is black.)

Somewhere I also have a white 19 tooth gear, I can't remember why...