Leak Stop Seal Kit for TH400 TH375 TH475 Turbo 400 Transmission, Speedometer Seal Kit, Transmission Oil Leak Prevention, High Temperature Resistant, Precise Fit, Easy Install, Durable Sealing Solution

GM TH400 leak-stop seal kit for leak prevention
✔️ High-temperature resistant, precise-fit seal kit for GM TH400 transmissions

This leak-stop seal kit is a ready-made solution for GM TH400 family transmissions, designed to prevent oil leaks and keep the gearbox running clean. It's commonly used during restorations, off-road builds, and routine maintenance where reliable sealing matters.

✅ Sealing solution resists gearbox oil and high temperature environments
✅ Precise fit for GM TH400, TH375, TH475 transmissions
✅ Includes housing O-ring, speedometer shaft seal, and retainer
✅ Durable construction with wear- and oil-resistance for long life

💡 What is a transmission seal kit typically used for?

It helps keep oil inside the transmission and seals critical points to prevent leaks.

• Keeps oil in place during high-temperature, high-pressure operation
• Works with common GM transmissions in the TH400 family
• Ideal for restorations, maintenance, and rebuild projects
• Includes components you need for a proper seal without extra parts