Speedo driven gear question

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84 Shorty

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My TH350 doesn’t have the gear housing or driven gear, it’s just plugged up. When I did the fluid change I popped the plug to see the driven gear. My understanding is it’s a 9 tooth drive since it’s green. I used a calculator to find out what driven gear I needed. It calculated a 27 tooth. But going off the chart for 350s. It only goes up to 25 teeth. Am I doing something wrong?

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74 Shortbed

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Nothing wrong, just need to figure a different combination of gears..
 

84 Shorty

Full Access Member
Joined
Dec 8, 2017
Posts
255
Reaction score
111
Location
Grovetown, GA
First Name
Andrew
Truck Year
1984
Truck Model
C10
Engine Size
350
That’s what I figured, just wanted a second opinion. Thanks
 

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