Speedo gear chart vs. math...

I have had these gears in and out many times and I am sure they are 3.55s. I have verified the clocking of speedo gear in trany.

Here are the readouts for rpm vs speedo reading.

2000 rpm = 25 mph
3000 rpm = 40 mph
4000 rpm = 50 mph

The speedo action is smooth and steady..