2004R speedo gears

[DoubleV]

Got the stock speedo gears in my 85 442 transmission. I'm gonna go with taller than stock tire ( 255/60/15 ). What speedo gears do I need to keep my speedo accurate?

 

[olds307 and 403]

They usually have a black 27 tooth driven gear but your 442 trans might be different. Figure out what your combo is, I use this calculator.
https://www.google.ca/url?sa=t&sour...FjAAegQICBAB&usg=AOvVaw3AjsNM7sUyDzX52a3jnvx_

 

[DoubleV]

http://montess.org/speedo_gears.html. This claims I should have a 10 gear already and I should need a 28 gear to match but I like to verify before buying.

 

[84cutspreme]

http://montess.org/speedo_gears.html. This claims I should have a 10 gear already and I should need a 28 gear to match but I like to verify before buying.

this is what i used for my 700r4
http://www.bgsoflex.com/speedo1.html

 

[DoubleV]

All signs seem to point to 10/28 gears. I should already have the 10 gear ( stock ) so I need to get a 28 gear.

If this somehow ends up being incorrect I will blame you guys and the entire interwebz!