SKU: TCI881004
UPC: 788120029728
MPN: 881004
The Speedometer Drive Gear Ford 23 Tooth White (TCI part number 881004) is a precision-engineered transmission accessory designed for accurate speedometer operation in classic Ford automatic transmissions. This 23-tooth driven gear is the critical component that translates driveshaft rotation into speedometer cable input, directly affecting instrument cluster accuracy and vehicle speed readout reliability.
The white nylon construction provides the durability required for continuous meshing with the speedometer drive gear while maintaining precision tolerances. Speedometer gears experience constant rotational stress, and selecting the correct tooth count is essential—a 23-tooth configuration is calibrated for specific Ford transmission applications and rear axle ratio combinations to ensure accurate mile-per-hour readings. Incorrect gear ratios result in speedometer error that compounds over the vehicle's lifetime, affecting trip computer data and fuel economy calculations. This driven gear seats within the transmission tail housing extension and operates in the fluid-filled transmission environment, making material selection critical for longevity and noise-free operation.
This part is engineered for Ford C4, C5, C6, and AOD automatic transmissions—the broad family of three- and four-speed automatics that equipped Ford vehicles from the 1960s through the 1990s. Restoration specialists, transmission rebuilders, and classic car enthusiasts rely on correct speedometer gearing to restore original accuracy after transmission service or rebuild. The compact 3.5 x 1.3 x 6.35 inch form factor and lightweight 0.05 lbs design ensure seamless integration into the factory transmission case during assembly or repair work.
Speedometer gear selection depends on drive gear teeth count and rear differential ratio. Substituting the wrong tooth count introduces systematic speed error that persists across all speeds. The 23-tooth white gear is available individually for targeted replacement or as part of a complete transmission rebuild kit. Verify your transmission type and original specifications before ordering to ensure correct calibration for your Ford application.
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