Speedometer calibration with a 700R4 Trans

[Bruce88]

Originally Posted by 67ChevyRedneck

I didn't either. So 1,000 if for all 67-72 stock speedos? Where did you find that info?

I wish I had a answer for you and a manual to point to that has the specification data but there is none that I have available to me. I can say that by using the 1000 revolutions per mile in your calculations your speedometer will read correctly for a 67-72 Chevy truck. Most cars and trucks from 1965 and up use the 1000 revolutions per mile on mechanical speedometers.

[nightmare]

Originally Posted by 67ChevyRedneck

I didn't either. So 1,000 if for all 67-72 stock speedos? Where did you find that info?

Originally Posted by Bruce88

I wish I had a answer for you and a manual to point to that has the specification data but there is none that I have available to me. I can say that by using the 1000 revolutions per mile in your calculations your speedometer will read correctly for a 67-72 Chevy truck. Most cars and trucks from 1965 and up use the 1000 revolutions per mile on mechanical speedometers.

IIRC, they are stamped in ink on the backside of the speedo.