Speedo Control Box Kit GM w/ 5/8 Threaded Cable

The Speedo Control Box Kit GM with 5/8 Threaded Cable is an essential component for GM vehicle owners looking to customize or repair their speedometer systems. This kit is particularly useful for those building custom hot rods, restoring classic Chevys, or modifying their trucks' drivetrains. It helps maintain accurate speed readings when the stock transmission or differential no longer matches factory specifications.

This speedometer control box operates by electronically adjusting the vehicle's speedometer signal in real time, compensating for changes in tire diameter, gear ratios, or transmission modifications that would otherwise produce inaccurate readings. The 5/8 threaded cable connection is the standard interface for most GM speedometer systems, ensuring reliable mechanical engagement with your existing speedometer drive. TCI's engineering ensures clean signal output and stable calibration across varying engine RPMs and vehicle speeds.

This speedo control box is ideal for street rodders, truck builders, and mechanics performing significant powertrain modifications on Chevrolet and GMC platforms. Its compact dimensions allow for flexible mounting in the engine bay or under-dash locations, and at 2.55 lbs, it adds minimal weight to your build. With this kit, you can eliminate speedometer errors and enjoy a more accurate driving experience.