Speedo Driven Gear GM 36-Tooth Natural

The Speedo Driven Gear GM 36-Tooth Natural from TCI is a precision speedometer drive component engineered for General Motors vehicles undergoing transmission swaps, gear ratio changes, or custom driveline builds. As a driven gear in the speedometer calibration system, this component works in concert with your vehicle's speedometer head to maintain accurate speed readouts despite modifications to rear axle ratios or gear sets. Whether you're installing a modern transmission into a classic muscle car, changing differential gearing, or building a custom hotrod, maintaining speedometer accuracy is critical for both street legality and monitoring true vehicle performance.

The 36-tooth design is the driven half of the speedo gear pair, meshing directly with the drive gear to translate driveshaft rotation into proportional speedometer needle movement. Machined in natural (uncoated) finish, this OEM-style gear offers excellent durability and precise tooth geometry that maintains tight tolerances with the mating drive gear. The compact 2.8 x 2.05 x 4.1-inch dimensions and minimal 0.12-pound weight make it simple to install, while the standard GM bolt pattern ensures seamless fitment within original or retrofit speedometer housings. TCI's manufacturing standards ensure consistent tooth profile that eliminates speed reading errors common with worn factory gears or inferior reproductions.

Mechanics and enthusiasts restoring or modifying first, second, and third-generation GM vehicles will find this driven gear essential when recalibrating speedometer systems for non-original rear axle ratios or transmission installations. It pairs with corresponding TCI drive gears to create custom speedo gear sets matched to your specific build configuration. Installation requires only basic hand tools and takes minutes, making it an economical solution for accurate speed calibration on any GM-based custom project. For serious builders seeking reliable speedometer accuracy without electronic recalibration, the Speedo Driven Gear GM 36-Tooth Natural delivers OEM-quality performance at a competitive price point.