Jetuplusllc Speedo Leak Stop Seal Kit for TH400 TH375 TH475 & 3L80E Transmissions

Overview

Keep your speedometer readings accurate and your transmission area clean with the Jetuplusllc Speedo Leak Stop Seal Kit. Engineered as a direct replacement for classic TH400 family transmissions and related models, this kit addresses the speedometer driven gear housing without requiring a full teardown. The result is a straightforward upgrade path for older vehicles or restoration projects that rely on reliable seals and dependable performance.

Condition: New. Brand: Jetuplusllc. Part Type: Seal Kit. Fitment Type: Direct Replacement. This kit focuses on the essential components involved in the speedometer housing seal, delivering a compact, all-in-one solution designed for ease of installation and consistent results.

Kit contents and fitment

• Housing O-Ring
• Speedometer Shaft Seal
• Speedometer Shaft Seal Retainer

Fitment covers TH375, TH400, TH475 and 3L80E transmissions from 1964 and up. The parts are designed to align with common seal layouts, enabling a direct replacement path that minimizes downtime and preserves original alignment.

Key benefits at a glance

• Durable seal components to help reduce seepage around the speedometer housing
• Direct replacement parts designed for straightforward installation
• Protects the speedometer drive area while supporting consistent readings
• Compact kit reduces clutter and simplifies maintenance planning

Real-world use scenarios

Ideal for classic car restorations, frequent-driver projects, and performance builds where a tight seal supports longevity and cleaner transmission surroundings. Users may notice easier maintenance and fewer drips in the work area, along with more predictable speedometer behavior over time.

Installation tips

• Inspect mating surfaces for wear before replacing seals
• Follow standard seal replacement procedures to ensure proper seating
• Replace related components if there is visible wear or damage
• Consult vehicle-specific guidance to confirm fit for your model