Subject: Conversion From 3-Speed to 4-Speed Transmission
Model and Year: 1956-1957 Corvette
Source: Chevrolet Service Bulletin, Zone #41 Wichita, Kansas
Number: 108
Date: October 8, 1957
A kit is now available containing the required control lever and bracket assembly and linkage to permit installation of a 4-speed transmission in 1956-57 Corvette units equipped with a 3-speed transmission.
PARTS DATA
| Part # | Description | # Req’d. |
|---|---|---|
| 3749586 | Conversion Kit | 1 |
| 3742510 | Selector Plate | 1 |
Installation instructions are furnished with the conversion kit.
Your very truly,
B.H. Berryhill
Zone Service Manager
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
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Article ID: 787
Created: August 3, 2014
Last Updated: August 3, 2014
Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article/1956-1957-corvette-service-bulletin-conversion-from-3-speed-to-4-speed-transmission-787.html