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$7.99
GM 3987921 Red 21 Tooth Speedometer Gear
GM 3987921 Red 21 Tooth Speedometer Gear

GM 3987921 Red 21 Tooth Speedometer Gear

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GM 3987921 Red 21 Tooth Speedometer Gear
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GM 3987921 Red 21 Tooth Speedometer Gear
GM 3987921 Red 21 Tooth Speedometer Gear
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Part # 92614446
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MFG. Part #:
3987921

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Transmission speedo gear.  Correct red color and 21 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 3.31 rear axle ratio with o/e size tires.  Replaces original GM part number 3987921.   

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