Speedometer gear 68

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Aug 20, 2013 | 10:59 PM

cdj46

Thread Starter

Racer

Joined: Mar 2011

Posts: 359

Likes: 13

From: Elma NY

Speedometer gear 68

I am looking for the correct speedometer gear for my 68 427 4 speed, 3:36 stock tires. Is there a chart that will tell me color of gear and # of teeth?
Thanks
Chuck

Aug 21, 2013 | 12:21 AM

DZRick

Le Mans Master

Joined: Jun 2005

Posts: 5,447

Likes: 3

From: Syracuse NY

Follow this link then click on ( Supporting document )

http://willcoxcorvette.com/repairand...lp.php?hID=131

I guess they only list the part numbers, sorry.

Last edited by DZRick; Aug 21, 2013 at 12:23 AM.

Aug 22, 2013 | 12:46 PM

cdj46

Thread Starter

Racer

Joined: Mar 2011

Posts: 359

Likes: 13

From: Elma NY

Speedometer gear 68

I did some more research. My car has a blue 20 tooth gear as it should be per a calculation on web site. Problem is the car reads 70 MPH when I think I am going ~40.

Aug 22, 2013 | 01:26 PM

Billem

Racer

Joined: Nov 2011

Posts: 374

Likes: 21

From: Charleston SC

I have no idea if this will help, but I've found that a 1 tooth change is worth approx. 5mph. (I.E. In my case, Speedo reading = 60, actual = 65; needed to go DOWN 1 tooth less). In your case, I believe there is something else wrong 'cause a 26 tooth gear is a little unusual, but who knows? BTW, the easiest way to check the speedometer is with a GPS. Have a great day, Bill

Aug 22, 2013 | 08:36 PM

cdj46

Thread Starter

Racer

Joined: Mar 2011

Posts: 359

Likes: 13

From: Elma NY

Speedo

Thanks Bill I never thought of GPS. I will try it.
Chuck

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