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Old 11-12-2009, 05:12 PM   #1
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3.73's installed ( need speedometer help )

I just installed an 8.8 rearend with 3.73 gears in my car today. I was wanting to know what color/#tooth trans gear do I need to correct my speedometer. I had 2.73's.
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Old 11-12-2009, 06:47 PM   #2
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Re: 3.73's installed ( need speedometer help )

For the v6 manual I think its the 21 tooth white gear. This is if its the 7 tooth drive gear for the 94-98 v6's.

The 94-98 v8's (GT's) are 8 tooth drive gears and it would a 23 tooth, not sure on color.
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Old 11-12-2009, 07:11 PM   #3
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Re: 3.73's installed ( need speedometer help )

I used the white gear in my 97 with 4:10's speedo still off but better.
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Old 11-16-2009, 07:22 PM   #4
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Re: 3.73's installed ( need speedometer help )

Jegs has one that's black 23 tooth but it's doesn't give a particular gear. It shows it used for 3.55,3.73, & 4.10. I guess this one will get me closer than the 2.73 gear I have know.
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Old 11-17-2009, 08:28 AM   #5
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Re: 3.73's installed ( need speedometer help )

no tooth gear will correct your speed issue, get a speed cal unit and leave the speedo gear alone. This will allow you to calibrate it.
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Old 12-20-2009, 01:36 PM   #6
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Re: 3.73's installed ( need speedometer help )

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Originally Posted by big show 98 View Post
Jegs has one that's black 23 tooth but it's doesn't give a particular gear. It shows it used for 3.55,3.73, & 4.10. I guess this one will get me closer than the 2.73 gear I have know.
I bought a Steeda gear, black 23 tooth. My speedometer is about 2mph off @ 75.
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Old 12-22-2009, 02:55 PM   #7
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Re: 3.73's installed ( need speedometer help )

speedo recalibrators are like $120 bucks from v6mustangstuff.com.

or u can get like me and just use your gps!
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Old 12-22-2009, 09:00 PM   #8
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Re: 3.73's installed ( need speedometer help )

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speedo recalibrators are like $120 bucks from v6mustangstuff.com.

or u can get like me and just use your gps!
The trans gear swap done the job. My trans has the old school technology!! I got to do it the cheap way $15
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Old 12-25-2009, 07:33 PM   #9
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Re: 3.73's installed ( need speedometer help )

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Originally Posted by big show 98 View Post
The trans gear swap done the job. My trans has the old school technology!! I got to do it the cheap way $15
good!
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