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Old 05-15-2007, 10:20 AM
Tyler
 
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speedo gear

hi guys, i have a trans am. its got a th 350, i changed the rear end gears from 2.73 to 3.08.. what do i have to do now to get the speedo accurate??

thanks

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Old 05-16-2007, 01:27 PM
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You need to make the driver and driven speedometer correct for your tire and gear application. ABOVE photo shows how they work. ( but the transmission is a 700R4 ) ...

Go here for speedo calibration information.

http://www.bgsoflex.com/speedo1.html

And here ... they sell the gears and pieces ...

http://www.transmissioncenter.net/sp...____va.htm#350
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Old 05-17-2007, 01:59 PM
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I went from a 3.08 to a 2.73 with my Suburban (T-350), and I had to change the driven gear the same percentage less teeth. I think it was from 19 to 17.
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