: Heavy-duty gearboxes frequently used in Ford and International Harvester trucks. New Process 435 (NP435)
: Another legendary "granny" box favored by Ford and Dodge enthusiasts for its 6.68:1 first gear. Other Contexts The phrase occasionally appears in other niche areas: granny trannies
: Historically used as slang for small, low-fidelity transistor radios used to test how a studio mix might sound on a "cheap" home device. : Heavy-duty gearboxes frequently used in Ford and
: The first gear ratio is exceptionally high (often around 6.5:1 or 7.0:1), providing immense torque for starting heavy loads or crawling over obstacles. : The first gear ratio is exceptionally high (often around 6
: Renowned for having one of the lowest first gears (7.05:1) and the shortest case length, making it ideal for short-wheelbase vehicles. Muncie SM465
: A later, slightly larger version commonly found in GM trucks from the late 60s through the early 90s. BorgWarner T18/T19
: In daily driving, these are typically operated as three-speed transmissions. Drivers start in second gear because the "granny gear" is too low for normal acceleration and often requires the vehicle to be nearly stopped to engage.