Speedometer Gear Chart

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Apr 1, 2007 | 09:09 AM

JimT

Thread Starter

Burning Brakes

Joined: Nov 2006

Posts: 893

Likes: 7

From: Orange Park Florida

Speedometer Gear Chart

Does anyone have a copy of the GM "speedometer gear chart" for a 1972 stingray? My speedo is reading 10-15MPH faster than it should. I have the stock 3.08 rear end with P225/70R15 tires, TH400 auto tranny, amd I'm not sure if the original speedo gear(s) have been replaced.
The tach is correct, and I clocked the car with a friend driving his car. I would like to know what the original gear was supposed to have been.

Thanks,
Jim Tison

Apr 1, 2007 | 03:49 PM

kayosnes

Racer

Joined: May 2005

Posts: 436

Likes: 0

From: Stavanger

Quote:

Originally Posted by JimT

On my 73 with 3.08 it is suposed to be 35teeth.

Apr 1, 2007 | 05:41 PM

JimT

Thread Starter

Burning Brakes

Joined: Nov 2006

Posts: 893

Likes: 7

From: Orange Park Florida

Thanks for the info.
I will be taking the speedo cable off of the tranny in the morning and I'll verify what I have. Thanks again.

Jim

Apr 1, 2007 | 07:12 PM

Star79

Melting Slicks

Joined: Apr 2004

Posts: 2,083

Likes: 2

From: Montreal Qc.

You can tell the # of teeth by the color of the gears. Here's a chart I use, it's for automatic trannies I think it applies to manuals as well (for the driven gear at least...)

Apr 1, 2007 | 08:03 PM

Duke94

Le Mans Master

Joined: Mar 2001

Posts: 6,640

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From: Ann Arbor Michigan

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