It conceivably could have been drilled for the Chevrolet but there was never a reason to do that as the Powerglide was a strong transmission. Some of the rare later ST300's had a bell housing that was cast like a "multi-case", but some were never drilled from the factory for the Chevrolet pattern in the United States other than the two lowest bolt holes that are shared, and never installed on any Chevy engine from the factory in the United States. This transmission was only produced with the "BOP" bell housing and was never used on any Chevrolet or Chevrolet based engines.įrom 1967-1969, the Super Turbine 300 was also available on the sporty Pontiac Firebird with the overhead cam inline six (230 and 250 cubic inches) or small V8 engines (326 and 350 cubic inches). It was offered on GM A platform cars, namely the Buick Skylark, Oldsmobile Cutlass, Pontiac Tempest/Lemans/GTO through 1966, and was available on the full-sized Buick LeSabre, Oldsmobile 88, Oldsmobile Jetstar 88, and Delmont 88 as a less expensive alternative to the three-speed Turbo-Hydramatic. The Super Turbine 300 (Jetaway) was introduced for the 1964 model year as a replacement for the earlier Buick Dual-path and Oldsmobile/Pontiac Roto Hydramatic transmissions. This feature was not used on the Pontiac versions of this transmission. The variable-pitch stator was eliminated after 1967. The blades were also set to the high position at idle to limit creep when stopped in Drive. At ⅔ to full throttle, the blades switched to the 51° high position, giving torque multiplication of 2.45:1 and a stall speed of approximately 2300 rpm. At light to medium throttle, the stator blades were at 32°, providing a torque multiplication of 1.8:1 and a converter stall speed of approximately 1800 rpm. The stator blades moved from high to low position by an electrical solenoid and a stator valve, controlled by a switch on the throttle linkage. Under light throttle, depending on the final drive ratio, it might upshift at 10-15 mph.įrom 1964-1967, Buick and Oldsmobile versions of this transmission used a torque converter with a variable-pitch stator called Switch-Pitch (by Buick) or Variable Vane (by Oldsmobile). In Drive at full throttle, it would upshift from low gear to high gear at 60–65 mph (97–105 km/h). The shift pattern was Park- Reverse- Neutral- Drive- Low. It was designed to start in low gear, providing a gear ratio of 1.765:1 plus the additional low-speed multiplication of the torque converter. It had a die cast aluminum case, and weighed 152 lb (69 kg). The unit wasĬooled with a small auxiliary oil cooler located beneath the engine radiator. The ST300 had a three-element torque converter, a front and rear multiple-disc clutch pack, and a compound planetary gearset with a front band and a clutch pack for reverse and manual low gear. It was the same transmission marketed under different brand names by each division including ST-300 by Buick, Jetaway by Olds and simply Automatic by Pontiac. It was used in various Buick, Oldsmobile, and Pontiac models from 1964-1969. The Super Turbine 300 (abbreviated ST-300) was a two-speed automatic transmission built by General Motors.
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