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Reply to "ZF Gear Speedo Ratio /1 and /2"

Many thanks for all the replies with the helpful info! I was not aware that there were different speedometers installed.

I recalculated the above tables with wheel diameters and diff ratio. The 1200 speedo from an early 71 needs a 5 teeth worm gear on the ZF output shaft (2,4 ratio on the tag), a 1.1:1 90° drive. The later need the 6 teeth worm gear (2.0 ratio), 1:1 and a 1600 speedo.

Now it is clear, that my currently mounted 1:1 gear is obviously wrong on a 71 pantera and I need find a 1.1:1 in order to get the correct speed.

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