Turboglide
From 1957 to 1961, Chevrolet also produced the Turboglide, a triple turbine continuously variable automatic transmission with concurrent ratios whose design was similar to that of Buick's Flight Pitch Dynaflow, subsequently called Triple Turbine (full technical description). The Turboglide, only offered with V8 engines, was more expensive (by about $50) than the Power Glide and did not have wide acceptance, in part due to failures in 1957-58 models, which were addressed by a significantly upgraded version for 1959.
Read more about this topic: Powerglide