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Firebird Speedometer Drive Gear 20 Tooth, Blue - 3987920
Image of Speedometer Drive Gear 20 Tooth, 3.08 Blue 3987920
 
Our Price: $12.95


PART NUMBER: TRA-131
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Description
 
New transmission speedo gear for your classic.  Correct blue color and 20 tooth design.  Exact fit for all automatic powerglide , turbo 350 and saginaw or muncie manual transmissions.  Will not work for automatic turbo 400 transmissions.  Factory match for 2.73 and 3.08 rear axle ratios with stockish size tires.  You may have to do some trial and error.  See gear selection chart in the installation and info tips on the home page.  Replaces original GM part number 3987920 perfectly.  

Part Number: TRA-131
Features
  • Excellent quality
  • Super easy to install

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1967 - 1968 Firebird UPPER Speedometer Cable with Firewall Grommet, 58 Inch 1967 - 1981 Firebird or Trans Am Speedometer Cable Support Routing Clip, Each Firebird Speedometer Drive Gear 20 Tooth, Blue - 3987920
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Our Price: $10.95

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Our Price: $12.95

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Image of 1967 - 1968 Firebird Upper Speedometer Cable with Firewall Grommet, 58 Inch Image of 1967 - 1981 Firebird or Trans Am Speedometer Cable Support Routing Clip, Each Image of Speedometer Drive Gear 20 Tooth, 3.08 Blue 3987920

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