Speedometer Plug 551908

Speedometer Plug

This speedometer plug, cross-referenced with part number 551908, blocks off the unused speedometer port in the transmission or engine housing.

Overview

This speedometer plug is designed to seal empty speedometer drive holes when converting to electronic systems or removing cables. The speedometer plug prevents transmission fluid or gear oil from leaking out of the housing port. This part is essential for mechanics and custom builders who need to secure the drivetrain housing against dirt and moisture.

Built For Performance

• Durable material construction resists degradation from gear oil and heat.
• Precision-machined tolerances ensure a tight, leak-free seal.
• Simple press-fit or bolt-in design allows for straightforward installation.
• Protects internal transmission components from external dirt and water.

On-The-Job Use

• Sealing unused mechanical speedometer ports after installing GPS speedometers.
• Preventing fluid leakage during custom motorcycle or automotive transmission swaps.
• Keeping dust and moisture out of transmission housings during bench storage.

Specs At A Glance

Good To Know

Q: Is a sealing gasket or O-ring required with this plug? A: Depending on the specific transmission housing, a sealing washer or thread sealant may be required for a completely liquid-tight seal.

Q: Can this plug be easily removed if a cable is reinstalled later? A: Yes, it is designed to secure the port without permanently damaging the housing threads or seat.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.