Marshall Instruments GM Speedometer Hall-Effect Sender; 16-Pulse (Universal; Some Adaptation May Be Required)

Speedometer Signal Conversion. The Marshall Instruments GM Speedometer Hall-Effect Sender provides accurate conversion of mechanical or electronic speedometer signals into consistent 16-pulse electronic output signals. This functionality makes it an essential component for custom vehicle installations and compatibility with early model transmissions utilizing electronic speedometers.

Construction and Appearance. Engineered for durability, this sender features a rugged design suitable for demanding automotive environments. It includes a precise 0.104-inch driver key and a robust threaded housing measuring 7/8-18 inches, capable of operating reliably across temperatures ranging from -40°C to +80°C. A quick disconnect cable wire harness is also included to facilitate easy connection.

Installation. The unit installs easily in most compatible transmissions, often requiring no additional drilling. Wiring follows a clear color code system—red for +12V, black for ground, and white for signal output—to assist efficient setup. While generally straightforward, some installations may require minor adaptations depending on the specific transmission model.

Application. Designed to fit a wide range of vehicles, this sender is especially suited for GM and Mopar early model transmissions. Some customization or adaptation could be necessary to ensure perfect integration and optimal performance in certain setups.

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