C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Speedo calib. after gear change??

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Old Apr 24, 2002 | 06:34 PM
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Default Speedo calib. after gear change??

Need some solid advice again...
I ordered a DANA 36 today with 3.07 gear ratio. How do you calibrate the speedometer after the swap? I am going from 2.59's to 3.07's. I was told by three different "experts" three different things. I don't believe any body until I check with every one on the forum though. Is this going to be a tough install?

Thanks for the advice, I will let you know how it goes.
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Old Apr 24, 2002 | 06:53 PM
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Default Re: Speedo calib. after gear change?? (x_streme)

on a 90 i believe you have to buy a thing that adjusts it, saw it in one of my magazines.
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Old Apr 24, 2002 | 07:58 PM
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Default Re: Speedo calib. after gear change?? (x_streme)

On a 90 you can just chance the speedo gears in the tail of the tranny. The simpliest part of the change. Give Jeff Kopp a call 1-800-728-8267, let him know you're on the forum. He'll set you up for a good price.
' :cheers:
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Old Apr 24, 2002 | 08:29 PM
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Default Re: Speedo calib. after gear change?? (Ramrod92)

On a 90 you can just chance the speedo gears in the tail of the tranny. The simpliest part of the change. Give Jeff Kopp a call 1-800-728-8267, let him know you're on the forum. He'll set you up for a good price.
' :cheers:
:yesnod: I'm doing the gears on my '93 and all of the speedo gears are in the tail shaft of the tranny. I needed 2 gears, 1 sensor and a new tail shaft gasket. Like the post above, give Jeff a call and tell him what you're doing - he'll set you up right. As a matter of fact, I won't buy original GM parts from anyone else!


[Modified by cprgmr, 6:29 PM 4/24/2002]
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Old Apr 25, 2002 | 05:43 AM
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Default Re: Speedo calib. after gear change?? (cprgmr)

On a 90 you can just chance the speedo gears in the tail of the tranny. The simpliest part of the change. Give Jeff Kopp a call 1-800-728-8267, let him know you're on the forum. He'll set you up for a good price.
' :cheers:

:yesnod: I'm doing the gears on my '93 and all of the speedo gears are in the tail shaft of the tranny. I needed 2 gears, 1 sensor and a new tail shaft gasket. Like the post above, give Jeff a call and tell him what you're doing - he'll set you up right. As a matter of fact, I won't buy original GM parts from anyone else!


[Modified by cprgmr, 6:29 PM 4/24/2002]

Well said, the electronic box like dakota digital makes warns against using them with anti lock brakes. Ive heard some say it works ok, But I wonder how would you know? The gears and sensor are the correct way to do it and a lot cheaper then the box!! Good luck
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