72 speedometer question
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Junior User
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72 speedometer question
Does anyone know how many revolutions of the speedometer cable on a 72 f100 it takes to register 1 mile? I need this info to calculate the correct speedo gear. Thanks in advance.
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
When I know what those three are, I'll tell you what the correct gear is.
The way you are going about it, will be impossible to calculate.
Cargo Master
Joined: Dec 2006
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From: hinckley ohio
I bought a kit from cj pony parts it has about 4 gears from 16 tooth to 21 tooth and adjusted it I believe 1 tooth is good for about 3-4 miles per hour my car was off about12-15 mph went from a 16 to 21 and it was right on.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
The same ones have been used since 1960, the prices range from $2.00 to $3.50 each.
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no not hooked up.
Ford sez: 1) You need the axle ratio. 2) The type of transmission and 3) The tire size to calculate the correct speedometer DRIVE & DRIVEN gears.
Axle ratio is I think 3.50:1 the transmission is a C6 but mine is 4wd so I have the NP205 t-case and my tire size is 33".
Ford sez: 1) You need the axle ratio. 2) The type of transmission and 3) The tire size to calculate the correct speedometer DRIVE & DRIVEN gears.
Axle ratio is I think 3.50:1 the transmission is a C6 but mine is 4wd so I have the NP205 t-case and my tire size is 33".
