Gear Speedometer Drive Red-21 Tooth-3.55 Rear Nylon-61-81

1961-1981 corvette speedometer drve gear - red 21 tooth. for 3.55 rear diff.

If your speedometer reads too high, a drive gear with one more tooth will slow it down approximately 5 miles per hour.

This nylon gear must be used with 54054 (steel speedometer drive gear for 3.08 to 3.55 rear ends). see below.

Gm part number: 3987921.