speedo gear teeth question

[NJB71]

31" tires, and 3.5 9" rearend....what size speedo?

 

[ralls]

Take a look at Jeff's Bronco. They have a breakdown on it .

 

[AGShelby]

Bronco Graveyard

Take a look at Jeff's Bronco. They have a breakdown on it .

Couldn't find the link - I need to replace mine, too.

 

[junebug]

Check out the Dennis Carpenter website. In their 66-77 catalog they have the equation to work it out. Its a PDF format so I couldnt cut and paste.

 

[Viperwolf1]

It's not as simple as looking up a table. D20's came with a variety of speedo drive gears and driven gears installed. You need to figure out the speedo error you have and which driven gear you're currently using. Then you can do some math to determine which gear you need to correct that error.

 

[NJB71]

actually speedo works on mine, I just wanted to replace it cause I figured it is 38 years old....so i guess I take it out and count teeth?