700R4 Speedometer Sensor Port Plug 551961Z For Chevy Transmission SBC 305 327

Speedometer Sensor Port Plug for Chevy

This speedometer sensor port plug for Chevy, referencing part number 551961Z, seals the unused speed sensor opening on automatic transmissions.

Overview

This speedometer sensor port plug for Chevy is designed to seal the transmission housing when the mechanical speedometer cable or speed sensor is removed. Ideal for custom builds, this speedometer sensor port plug for Chevy prevents transmission fluid from leaking out of the tailshaft housing. Custom transmission builders rely on this speedometer sensor port plug for Chevy to ensure a clean, leak-free drivetrain setup.

Built For Performance

• Billet aluminum material resists wear and fluid corrosion
• O-ring seal provides a dependable barrier against transmission fluid leaks
• Precision machining matches factory port dimensions exactly
• Low-profile design avoids interference with surrounding chassis components

Fits These Machines

• for Chevy 700R4 Transmission
• for Chevy Small Block (SBC) 305
• for Chevy Small Block (SBC) 327

On-The-Job Use

• Blocking off unused speedometer gear ports during electronic gauge conversions
• Sealing transmission casings on custom street rods and drag cars
• Preventing fluid loss on vehicles using alternative speed tracking methods

Specs At A Glance

Good To Know

Q: Does this plug require sealant during installation? A: While the built-in O-ring provides the primary seal, ensuring the transmission bore is clean is key to preventing leaks.

Q: Can this be used on manual transmissions? A: This specific plug is designed for the 700R4 automatic transmission speed sensor port.

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