1974 - 1975 Corvette: Service Bulletin: Stripped Speedometer Driven Gear, 1974-1975 Corvette with 4-Spd. Transmission
Model Year: 1974-1975
Subject: Stripped Speedometer Driven Gear, 1974-1975 Corvette with 4-Spd. Transmission
Source: Chevrolet Dealer Service Technical Bulletin
Date: Jan. 17, 1975
TO: ALL CHEVROLET DEALERS
On 1974 and 1975 Corvettes with 4-speed transmission, an inoperative speedometer due to a stripped driven gear may be the result of relatively high internal friction in the speedometer adapter.
A new low friction adapter and key will be phased into production in January, 1975 and will be available for service under the numbers listed below:
1565211 ---- Adapter
6476870 ---- Key
For service, vehicles exhibiting this problem may be corrected by the following method:
- Remove driven gear and replace with new gear of same part number and color.
- Remove and discard production adapter and key and install new adapter and key.
Chevrolet Motor Division
General Motors Corporation