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Speedometer gear

Forum: C3 Engines, Driveline and Handling

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Speedometer gear

Posted: 8/30/12 12:40pmMessage 1 of 4

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COLUMBUS, NC - USA

Joined: 8/19/2012

Posts: 42

Vette(s): 2011 Grand Sport Coupe, 6-speed 1977 Coupe L82, 4-speed

I'm gonna change the differential from a 3.70 to a 3.36 on my '77 L-82 4-speed. It's gonna need a different speed-o gear. I assume that it will be a smaller gear than what's in the tranny now. Does anyone know which one will get my speed-o back to accurate after the gear change?

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Re: Speedometer gear

Posted: 8/30/12 5:01pmMessage 2 of 4

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Joined: 7/2/2006

Posts: 8205

corvette440hp

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Re: Speedometer gear

Posted: 8/30/12 5:04pmMessage 3 of 4

Lifetime Member

Joined: 7/2/2006

Posts: 8205

From the above chart you'll need the 18 tooth (#3987918) brown gear.

|UPDATED|8/30/2012 5:04:11 PM (AZT)|/UPDATED|

corvette440hp

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Re: Speedometer gear

Posted: 9/1/12 4:36pmMessage 4 of 4

Free Member

COLUMBUS, NC - USA

Joined: 8/19/2012

Posts: 42

Vette(s): 2011 Grand Sport Coupe, 6-speed 1977 Coupe L82, 4-speed

Thank you very much. That's gonna save me a lot of trouble.

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