GM #3708145 ("small" 8-tooth) 1.77" O.D. .531" wide Designed for use with nylon gears from 22 teeth to 25 teeth and 3:70-4:56 rear end ratio. NOTE: These gears have 30mm bore, used with 27 spline mainshaft.
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If you have updated your Corvette from the standard speedometer cable type transmission to an electronic speedometer transmission then you need this converter. This allows the speed signal to be convertered from the electronic to manual…
This is a reproduction speedometer driven gear, identified by both its tooth count and color. Replace your worn out, stripped or damaged original gear or simply use a different gear for speedometer correction when changing rear axle…
GM #3978758 ("large" 8-tooth) 1.84" O.D. Designed for use with nylon gears from 18 teeth to 22 teeth and 3:08-3:70 rear end ratio. NOTE: These gears have 35mm bore, used with 32 spline mainshaft.
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