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1965 Corvette: Engineering Service Letter: Powerglide Transmission Control Rod Adjustment

This Engineering Service Letter covers all 2,021 RPO M-35 Powerglide 1965 Corvettes.

T.N. #8 - Aug. 5, 1965

ESL’s - Continued


In the 1965 Corvette the adjustable Powerglide Transmission control rod clevis is located at the transmission range selector and parking brake outer lever (bell crank). However, there is no room to turn the clevis to adjust the control rod at the forward end.  Misadjustment can result in transmission failure due to operation without the controls being in full detent.  Such operation results in reduced oil pressure and, in turn, partial engagement of the affected clutches.

In the 1966 Corvette an adjustable clevis will be located at the transmission floor shift lever where there is room for adjustment.  The 1966 Transmission Control Rod Unit will be made available primarily for the addition of this improvement in the 1965 model.  Due to low volume sales of the current rod, it will also be used to replace the control rod in the 1966 Corvette.

As soon as the required 1966 parts become available, this unit will also be available.

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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