Does 3.73 Gears Affect Speedometer??

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10-19-2007, 05:11 PM

Hawaii 93 Stang

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Join Date: Oct 2007

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Does 3.73 Gears Affect Speedometer??

Hello. I just got my 93 Mustang 5.0LX couple of nights ago. Previous owner put some 3.73 gears. Does it affect the speedometer??? I have an automatic and at 70mph RPM is only at 2100-2200. Is this correct??? Need some help here. Thanks!!

10-19-2007, 05:12 PM

r.barn

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Join Date: Feb 2006

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RE: Does 3.73 Gears Affect Speedometer??

Yes it does, but you replace a small gear on speedo cable to correct

Sounds like yours was not done.

10-19-2007, 05:14 PM

5.0stanger

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Join Date: Feb 2006

Location: Howard City, MI

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RE: Does 3.73 Gears Affect Speedometer??

It will affect it, you will need a new speedo drive gear.

10-19-2007, 05:16 PM

5.0stanger

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RE: Does 3.73 Gears Affect Speedometer??

https://mustangforums.com/m_1108239/tm.htm

10-19-2007, 06:25 PM

Hawaii 93 Stang

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RE: Does 3.73 Gears Affect Speedometer??

Thanks guys!!!!

10-19-2007, 09:06 PM

mjr46

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Join Date: Jun 2007

Location: West Virginia

Posts: 30,863

RE: Does 3.73 Gears Affect Speedometer??

you'll need the red one I believe

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