Speedometer Port Plug Tremec & BW T5/T45

The Speedometer Port Plug for Tremec and Borg Warner T5/T45 transmissions is an essential component for any builder or restorer working with these classic manual gearboxes. When converting to a newer transmission or modifying your driveline, the speedometer port on the tailhousing must be sealed to prevent fluid leakage and contamination. This aluminum plug provides a clean, permanent solution for blocking the speedometer cable opening, whether you've eliminated the mechanical speedo in favor of electronic gauges or are simply consolidating ports during a transmission swap.

Manufactured from solid aluminum and finished in black anodize, this plug resists corrosion and blends seamlessly with modern engine bay aesthetics. The anodized coating not only protects against oxidation in harsh underhood environments but also provides a professional appearance that maintains transmission durability. The compact 0.09 lb design integrates directly into the existing speedometer port on Tremec T-5 and Borg Warner T-45 tailhousing units, requiring no modification to the transmission case itself. Black anodize finish ensures long-term reliability while preventing galvanic corrosion between dissimilar metals.

Transmission enthusiasts and performance builders routinely install this plug during complete gearbox rebuilds, modern swap projects, or when upgrading to fully digital instrument clusters. Whether you're restoring a classic performance car, installing an LS engine with a modern manual transmission, or simply decommissioning old mechanical speedometer systems, this plug seals the port reliably and prevents transmission fluid weepage that can contaminate engine bay components. One plug is supplied per order, making installation straightforward and ensuring proper tailhousing integrity for years of reliable shifting.