1958 Powerglide Transmission

[Ray C.]

I am researching information on a 1958 Corvette that currently has a standard transmission. The engine is supposed to be original and the dates align with the build date. The engine code (DG) is for the base engine with the Powerglide transmission (code 313). Could some one please provide me with information on the differences between a Powerglide for a passenger car and one for a Corvette of this vintage? Would there be date stamps or other markings that one would needed when finding a replacement Powerglide transmission?

Thanks Ray

[Roy B.]

Re: 1958 Powerglide Transmission

1958 was the first year to use a vacuum line to a modulator R/S. Corvette and Car
58 car dates will match Corvette dates
Corvette rear housing mounts the shifter , car don't but you could have a bracket made to work.
Corvette has the safety switch on the trans.R/S get a repro., car is on the steering column.
Corvette torque Convertor IS different , but car will work OK
Bottom line , you can use a car PG, but must make changes on the out side only.
PS: if your 58 is vary early, a 57 Corvette trans having no vacuum line is correct and will have 57 dates.

[Tom D.]

Re: 1958 Powerglide Transmission

I assume you have a PG rear axle code also... (AE according to Colvin, p. 201 of the 55-59 book)

[John S.]

Re: 1958 Powerglide Transmission

Shifter linkage for corvette PG is very unique. john