https://flic.kr/p/4cWgq8 | Hydra-Matic instruction book | This book, published for the 1940 Oldsmobile, tells all about the new automatic transmission and how it makes driving different. This was the real breakthrough in automatic transmissions, and it worked really well. My first car, an Olds, had Hydra-Matic.
Did you know that a torque converter pressurizes automatic transmission fluid? If this piece is damaged or worn down, you may hear grinding sounds. Learn more in this infographic from a transmission repair shop in Reseda.