C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Sep 10, 2007 | 02:18 PM
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Default Speedo Driven Gear

DOES ANYONE KNOW THE PROPER COLOR AND TOOTH# OF THE DRIVEN GEAR THAT i WOULD NEED FOR 350TH TRANNY AND 3:55 DIFF. GEARS. IT HAD 3:08 IN IT BEFORE.THANX
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Old Sep 10, 2007 | 05:37 PM
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just changed mine to the "black" gear and it seems close
i had removed a "natural" from when it had a 3.08 as i also had installed a 3.55


but it still depends on your tire size and speedo

there are a couple of web sites that will give you some guidance
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Old Sep 10, 2007 | 05:39 PM
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natural 19 tooth
black 23 tooth
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Old Sep 10, 2007 | 06:06 PM
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Old Sep 10, 2007 | 06:16 PM
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Thanx bt and Duke. So it looks like I need the black 40 tooth if i am understanding this right? bt,did you have to put in a different sleeve asm?

Last edited by 76 VETTE; Sep 10, 2007 at 06:46 PM.
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Old Sep 10, 2007 | 06:55 PM
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ttt
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Old Sep 10, 2007 | 07:24 PM
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Originally Posted by 76 VETTE
Thanx bt and Duke. So it looks like I need the black 40 tooth if i am understanding this right? bt,did you have to put in a different sleeve asm?
That's the way I read it too.
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Old Sep 10, 2007 | 07:53 PM
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no i did a direct swap, the th350 and a muncie use the same small gear set, some members may have some laying around, this website has some good info or you can use keislers site to calculate rpm and speed,

http://chevelleengineer.home.comcast.net/speedo.htm
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Old Sep 10, 2007 | 08:35 PM
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Thanx guys..dale
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