En route from Denver to Summit Country in the Colorado Rockies, we drove past a Sonic drive-in where our attention was drawn to several vehicles in the parking lot. Especially captivating was this beautifully maintained royal blue and white 1951 Chevy PowerGlide, sitting a little lop-sided because of its modern hydraulic suspension.
PowerGlide was a 2 speed automatic transmission manufactured by General Motors between 1950 and 1973, the first automatic transmission available to the "average" consumer market. The initial transmissions were cast-iron, although starting in 1962 they were made of aluminum.
A few Chevys were parked around the lot as well. Nice, but not as intriguing as that PowerGlide!