Description
The Speedhut VW & BMW Speedometer Thread-on Mechanical Drive Cable (A-331) provides a reliable connection between the Speedhut SPEEDBOX™ (sold separately) and your original mechanical speedometer found in many pre-1984 Volkswagen (VW), BMW, and Vanagon vehicles. This 3-foot cable is specifically designed for speedometers that utilize a “thread-on style” connector with an M18X1.5 thread. It allows you to drive your existing mechanical speedometer using the GPS signal processed by the Speedhut SPEEDBOX™, offering a modern solution for accurate speed readings in your classic vehicle.
KEY FEATURES AND BENEFITS:
- Enables GPS Speedometer Operation: Allows the use of a GPS signal (via the SPEEDBOX™) to drive your original mechanical speedometer.
- Vehicle-Specific Compatibility: Designed for “thread-on style” mechanical speedometers in pre-1984 VW, BMW, and Vanagon models.
- Broad Model Support: Compatible with VW Beetles, Squarebacks, Rabbits, Ghias, pre-1984 Vanagons, and various BMW models.
- Flexible Length: Features a 3-foot cable that offers ample flexibility for SPEEDBOX™ mounting behind the dashboard.
- Secure Thread-on Connection: Utilizes an M18X1.5 threaded end for a stable and reliable interface with your speedometer.
SPECIFICATIONS:
- Connector Style: Thread-on (M18X1.5)
- Length: Approximately 3 feet
HOW TO USE:
- Prepare the SPEEDBOX™: Ensure you have the Speedhut SPEEDBOX™ unit (sold separately).
- Disconnect Old Cable: Locate the speedometer cable connection point on the back of your vehicle’s mechanical speedometer and detach the existing cable.
- Connect to SPEEDBOX™: Attach one end of the Speedhut A-331 cable to the output drive of the SPEEDBOX™.
- Attach to Speedometer: Thread the other end of the A-331 cable onto the “thread-on style” connector on the back of your mechanical speedometer, ensuring a secure fit.
- Route the Cable: Neatly route the cable behind the dashboard, avoiding sharp bends and obstructions.
- Mount the SPEEDBOX™: Install the SPEEDBOX™ in a location where it can receive a GPS signal and connect it to a power source, following installation instructions.
BENEFITS OF USING THE SPEEDHUT VW & BMW SPEEDOMETER THREAD-ON MECHANICAL DRIVE CABLE (A-331):
- Preserves the original aesthetics of your classic VW or BMW dashboard while modernizing performance.
- Eliminates the need to replace your mechanical speedometer when switching to GPS-based speed sensing.
- Provides flexibility in installation due to its 3-foot length.
- Delivers a dependable and secure connection using its precise thread-on design.
- Improves accuracy of speed readings, especially in modified vehicles or where original systems are no longer reliable.
FEATURES:
- Thread-on Compatibility: Designed specifically for “thread-on style” mechanical speedometers.
- Thread Size: M18X1.5 thread for a secure connection.
- GPS Integration: Facilitates GPS-driven speedometer operation via the Speedhut SPEEDBOX™.
- Classic Vehicle Support: Compatible with a range of pre-1984 VW and BMW classic models.






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