1958 Corvette: Service Bulletin: Speedometer Driven Gear
Estimated Reading Time: < 1 Minute Model Year: 1958 Corvette
Subject: Corvette Speedometer Driven Gear
Source: Chevrolet Service Bulletin
Number: 47
Date: April 25, 1958
Zone: #41, Wichita, Kansas
Due to an oversight, a duplication of color codes of speedometer driven gears exists between the Corvette gear #3708699 for 3 and 4 speed transmissions and the 3.7 to 1 rear axle and the passenger car gear #37608246 used with the 3.36 to 1 axle. Both of these gears are colored "Blue".
Identification Data
3708699 -- Gear -- Corvette -- 3.7 Axle -- 22 Teeth
3708246 -- Gear -- Pass.Car -- 3.36 Axle -- 20 Teeth
In GM parts we used to go by the color when we grabbed a gear. The same color with different tooth count would be confusing.