Drive Key Speed Sensor Replacement for 5291

The Drive Key Speed Sensor Replacement for 5291 is a precision replacement component engineered for Autometer speedometer sending units. This steel drive key serves as the critical mechanical interface between your vehicle's transmission output shaft and the speedometer mechanism, translating wheel speed into accurate dashboard readings. Whether you're diagnosing erratic speedometer behavior, restoring a classic gauge cluster, or rebuilding a sending unit assembly, this OEM-grade replacement ensures your speed data is captured and displayed with factory accuracy.

Constructed from durable steel with a zinc oxide finish, the Drive Key Speed Sensor Replacement resists corrosion and wear in the demanding environment of a transmission housing. The zinc oxide coating provides both protective oxidation resistance and a clean, finished appearance that meets OEM specifications. At just 0.02 lbs and dimensioned at 3.75 x 0.45 x 4.9 inches, the compact drive key fits precisely within the speedometer sending unit assembly, maintaining the exact mechanical tolerances required for reliable pulse generation. This replacement component restores the synchronization between transmission speed and speedometer function, eliminating the guesswork when diagnosing speed-related gauge issues.

Mechanics and automotive enthusiasts benefit most when rebuilding or repairing Autometer speedometer sending units, particularly in applications where the original drive key has worn, broken, or developed play within the assembly. Installation requires removing the sending unit from the transmission, disassembling the unit body, and replacing the worn key—a straightforward repair that restores smooth, lag-free speedometer operation. This replacement is essential for any technician maintaining classic instruments, restoring vintage gauge clusters, or troubleshooting modern vehicles equipped with mechanical speedometer interfaces. Ensure compatibility with your specific Autometer model before ordering by cross-referencing your sending unit part number.