Speedo calibration??
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Joined: Apr 2001
Posts: 311
From: I been everywhere, man
Speedo calibration??
I just bought a 1990 IROC that a previous owner put 4.11:1 gears in. It is a blast to drive but the speedo is wacked out. Can I buy a set of speedo gears or something to get it working right??
Registered User
Joined: Jul 2002
Posts: 3,768
From: Friendswood, TX, USA
Short answer is yes. Don't remember what year they changed. If it has VSS you can get a module that's adjustable. If it's still cable driven, (I don't think so), you can get gears from GM that go in the trans. tail shaft. Check the 3rd Gen board.
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Registered User
Joined: Apr 2001
Posts: 311
From: I been everywhere, man
It has VSS. Do you know where I could get an adjustable module?? I thought this was the 3rd gen board.
Registered User
Joined: Mar 2006
Posts: 47
From: Baltimore, MD
All you have to do is find out what drive and driven gear combination will work for your setup.
This link should help http://www.700r4.com/speedoCalc/speedocalc.shtml
This link should help http://www.700r4.com/speedoCalc/speedocalc.shtml
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Joined: Sep 2005
Posts: 347
From: Killeen, Texas
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