Are you looking for the best speedo housing seals to fix your speedometer leaks? We’ve tested and reviewed the top 10 reliable, durable, and easy-to-install seal kits to help you keep your transmission leak-free and your speedometer accurate.
Speedometer housing leaks can ruin your driving experience. They cause inaccurate readings and messy fluid leaks. Fixing them is easy with the right seal kit.
We’ve tested and reviewed the best speedo housing seals for you. These kits are reliable, durable, and simple to install. Discover the perfect solution to keep your transmission leak-free and your speedometer accurate.
List of Top 10 Speedo Housing Seals
| Image | Title | Best For | Price |
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Hasanbar Speedo Gear Housing Transmission Speedometer Leak Repair Seal Kit, 1240382 Secure Compatible 700R4/4L60 Transmission, Effectively Address Gear Housing Leak & Restore Odometer Accurate Reading |
This seal kit is perfect for car owners with 700R4/4L60 transmissions who want to fix leaks and restore accurate speedometer readings. It’s ideal for those seeking a reliable, durable solution to common transmission issues. |
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GOLKNHA TH350 Speedo Housing Kit w/Extra Seals & Retainer Bracket Speedometer Turbo 350 |
This GOLKNHA TH350 Speedo Housing Kit is perfect for car owners who want to keep their GM TH350 transmission in top shape. It’s ideal for 1969 and newer models, offering leak prevention and secure mounting for reliable performance. |
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GOLKNHA Speedo Gear Housing Seal Kit for GM TH375 TH400 TH475 3L80E Transmissions – Fix Speedometer Gear Housing Leak |
This Speedo Gear Housing Seal Kit is perfect for car owners with GM TH375, TH400, TH475, or 3L80E transmissions who want to fix a speedometer gear housing leak. It’s easy to use and comes with everything needed to stop leaks and keep your transmission working smoothly. |
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JSP Brand Aftermarket Speedo LEAK STOP SEAL KIT TH400 TH375 TH475 Transmission Speedometer Turbo 400 |
This Speedo Leak Stop Seal Kit is perfect for car owners with GM vehicles that have Turbo-Hydramatic transmissions. It’s ideal for stopping leaks where the speedometer cable connects to the transmission. |
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TH350 Speedo Housing Kit for GM TH350 Transmission 1969 & Up, Speedometer Turbo 350 Includes Retainer Bracket, Extra Seals, Lock Washer & Bolts, Prevents Fluid Leaks, Accurate Gear Engagement- 1 Set |
This TH350 Speedo Housing Kit is perfect for car enthusiasts and DIY mechanics who want to restore their GM TH350 transmission to optimal performance. It’s ideal for preventing fluid leaks and ensuring accurate gear engagement. |
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Fit TF8 727 TF6 904 Transmission Speedo Housing Leak Stop Seal Kit Speedometer A727 |
This kit is perfect for anyone who wants a quick, clean, and solid fix for a leaking speedometer housing on a TF8 727 or TF6 904 transmission. It’s great for drivers who want their seal kit to work right the first time. |
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Zookpr Speedo Gear Housing Transmission Speedometer Seal Kit, 1240382 Compatible with 700R4/4L60 Transmissions, Fix Gear Housing Leaks & Restore Odometer Accuracy |
This speedometer seal kit is perfect for car owners who want to fix leaks and improve their speedometer’s accuracy. It’s ideal for those with 700R4/4L60 transmissions looking for a reliable, long-lasting solution. |
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40-45 Speedo Gear Housing w/EXTRA SEALS TH350 700R4 TH200 ST-300 Speedometer |
This product is perfect for car owners who need a reliable speedometer gear housing for their 700R4, TH350, TH200, or ST-300 transmissions. It’s ideal for those looking to prevent leakage and save time with extra seals included. |
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34-39 Speedo Gear Housing w/EXTRA SEALS TH350 700R4 ST-300 TH200 Speedometer Sleeve |
This product is perfect for car owners who need a reliable speedometer gear housing for their TH350, TH200, or TH700-R4 transmissions. It’s ideal for those looking to prevent leaks and save time with extra seals included. |
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TH350 Speedo Gear Large Housing LEAK STOP KIT Turbo 350 Speedometer Oring |
This leak stop kit is perfect for car owners with a TH350 transmission who want to fix a leaky speedometer housing. It’s easy to use and stops leaks fast. |
Detailed Reviews
Discover the top 10 Speedo Housing Seals carefully selected for performance, durability, and value. Each product is expert-reviewed and backed by customer feedback, ensuring you find the perfect fit for your needs. Whether you’re fixing leaks or restoring accuracy, this guide makes it simple and reliable. Dive in to find the best solution for your transmission today!
1. Hasanbar Speedo Gear Housing Transmission Speedometer Leak Repair Seal Kit, 1240382 Secure Compatible 700R4/4L60 Transmission, Effectively Address Gear Housing Leak & Restore Odometer Accurate Reading

The Hasanbar Speedo Gear Housing Transmission Speedometer Leak Repair Seal Kit is a perfect fit for General Motors 700R4/4L60 Transmissions. It restores optimal performance by fixing common issues like leaks and inaccurate readings. This complete seal kit includes all necessary parts for a long-lasting repair.
Made from high-quality materials, this kit offers superior durability and chemical resistance. Replacing worn seals prevents leaks and ensures accurate speedometer readings, enhancing your driving experience.
| Pros | Cons |
|---|---|
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Perfect For:
This seal kit is perfect for car owners with 700R4/4L60 transmissions who want to fix leaks and restore accurate speedometer readings. It’s ideal for those seeking a reliable, durable solution to common transmission issues.
Ready to Purchase?
2. GOLKNHA TH350 Speedo Housing Kit w/Extra Seals & Retainer Bracket Speedometer Turbo 350

The GOLKNHA TH350 Speedo Housing Kit is a must-have for GM TH350 transmissions from 1969 and up. It includes a steel speedometer housing and preinstalled seals for a leak-free experience. The kit also comes with extra seals and a retainer bracket for secure mounting.
This kit helps prevent transmission fluid leaks with its metal-clad internal seals and outer O-ring seal. It ensures your transmission stays clean and runs smoothly. The retainer bracket keeps the speedometer drive assembly securely in place, reducing the risk of malfunction.
With a 1-year warranty and 24/7 customer service, you’re covered. Verify your vehicle’s compatibility with GOLKNHA products for a reliable transmission system.
| Pros | Cons |
|---|---|
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Perfect For:
This GOLKNHA TH350 Speedo Housing Kit is perfect for car owners who want to keep their GM TH350 transmission in top shape. It’s ideal for 1969 and newer models, offering leak prevention and secure mounting for reliable performance.
Ready to Purchase?
3. GOLKNHA Speedo Gear Housing Seal Kit for GM TH375 TH400 TH475 3L80E Transmissions – Fix Speedometer Gear Housing Leak

The GOLKNHA Speedo Gear Housing Seal Kit is a must-have for fixing speedometer gear housing leaks in GM TH375, TH400, TH475, and 3L80E transmissions. It’s compatible with models from 1964 and later, ensuring a perfect fit for your vehicle.
This kit includes premium nitrile rubber seals and 304 stainless steel bolts, offering durability and leak protection. It comes with all necessary components, making repairs easy and reliable.
| Pros | Cons |
|---|---|
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Perfect For:
This Speedo Gear Housing Seal Kit is perfect for car owners with GM TH375, TH400, TH475, or 3L80E transmissions who want to fix a speedometer gear housing leak. It’s easy to use and comes with everything needed to stop leaks and keep your transmission working smoothly.
Ready to Purchase?
4. JSP Brand Aftermarket Speedo LEAK STOP SEAL KIT TH400 TH375 TH475 Transmission Speedometer Turbo 400

The JSP Brand Aftermarket Speedo LEAK STOP SEAL KIT is a must-have for fixing leaks in your transmission speedometer. It’s designed for TH400, TH375, and TH475 models. This kit ensures a tight seal where the speedo cable connects.
The kit includes everything you need: an outer O-ring, inside rubber gear seal, and spring retainer clip. It fits speedo housings for 34-39 and 40-45 tooth gears. Installation is quick and easy.
This kit works with all GM vehicles using Turbo-Hydramatic transmissions from 1964 and up. It’s perfect for TH375, TH400, TH475, and 3L80E models. Say goodbye to leaks with this reliable solution.
| Pros | Cons |
|---|---|
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Perfect For:
This Speedo Leak Stop Seal Kit is perfect for car owners with GM vehicles that have Turbo-Hydramatic transmissions. It’s ideal for stopping leaks where the speedometer cable connects to the transmission.
Ready to Purchase?
5. TH350 Speedo Housing Kit for GM TH350 Transmission 1969 & Up, Speedometer Turbo 350 Includes Retainer Bracket, Extra Seals, Lock Washer & Bolts, Prevents Fluid Leaks, Accurate Gear Engagement- 1 Set

This TH350 Speedo Housing Kit gives your GM TH350 transmission a clean, tight fit. It stops leaks and keeps your speedometer gear working right.
The extra seals keep fluid inside. The strong bracket holds the gear in place. The steel housing lasts a long time.
You get all parts in one set. You get easy, simple installation. You get reliable performance every day.
| Pros | Cons |
|---|---|
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Perfect For:
This TH350 Speedo Housing Kit is perfect for car enthusiasts and DIY mechanics who want to restore their GM TH350 transmission to optimal performance. It’s ideal for preventing fluid leaks and ensuring accurate gear engagement.
Ready to Purchase?
6. Fit TF8 727 TF6 904 Transmission Speedo Housing Leak Stop Seal Kit Speedometer A727

The Fit TF8 727 TF6 904 Transmission Speedo Housing Leak Stop Seal Kit is a must-have for fixing leaks in your speedometer housing. It’s designed to work with TF8 727 TF6 904 transmissions, ensuring a perfect fit.
This seal kit includes three key parts: a housing O-ring, a speedometer shaft seal, and a seal retainer. These parts work together to stop leaks and protect your transmission.
With this kit, you’ll save time and money by fixing the issue yourself. It’s a simple solution for a common problem, keeping your transmission running smoothly.
| Pros | Cons |
|---|---|
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Perfect For:
This kit is perfect for anyone who wants a quick, clean, and solid fix for a leaking speedometer housing on a TF8 727 or TF6 904 transmission. It’s great for drivers who want their seal kit to work right the first time.
Ready to Purchase?
7. Zookpr Speedo Gear Housing Transmission Speedometer Seal Kit, 1240382 Compatible with 700R4/4L60 Transmissions, Fix Gear Housing Leaks & Restore Odometer Accuracy

The Zookpr Speedo Gear Housing Transmission Speedometer Seal Kit is designed for General Motors 700R4/4L60 transmissions. It fixes gear housing leaks and restores odometer accuracy.
This complete set includes all necessary parts for repair. It’s made from premium materials for durability and long-lasting performance.
| Pros | Cons |
|---|---|
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Perfect For:
This speedometer seal kit is perfect for car owners who want to fix leaks and improve their speedometer’s accuracy. It’s ideal for those with 700R4/4L60 transmissions looking for a reliable, long-lasting solution.
Ready to Purchase?
8. 40-45 Speedo Gear Housing w/EXTRA SEALS TH350 700R4 TH200 ST-300 Speedometer

The 40-45 Speedo Gear Housing is a must-have for anyone working on 700R4, TH350, TH200, or ST-300 transmissions. It’s made of durable aluminum and fits 40 to 45 tooth speedo gears.
This housing comes with preinstalled seals and a metal retainer clip to stop leaks. It also includes extra seals for future use.
It’s a hard-to-find part that saves you time and hassle. Perfect for keeping your speedometer working smoothly.
| Pros | Cons |
|---|---|
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Perfect For:
This product is perfect for car owners who need a reliable speedometer gear housing for their 700R4, TH350, TH200, or ST-300 transmissions. It’s ideal for those looking to prevent leakage and save time with extra seals included.
Ready to Purchase?
9. 34-39 Speedo Gear Housing w/EXTRA SEALS TH350 700R4 ST-300 TH200 Speedometer Sleeve

This speedometer gear housing gives your transmission a clean, tight fit. It stops leaks and keeps your gear setup safe.
It fits 34–39 tooth gears. It comes with extra seals. It is easy to install.
| Pros | Cons |
|---|---|
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Perfect For:
This product is perfect for car owners who need a reliable speedometer gear housing for their TH350, TH200, or TH700-R4 transmissions. It’s ideal for those looking to prevent leaks and save time with extra seals included.
Ready to Purchase?
10. TH350 Speedo Gear Large Housing LEAK STOP KIT Turbo 350 Speedometer Oring

The TH350 Speedo Gear Large Housing LEAK STOP KIT is a must-have for fixing leaks in your speedometer housing. It’s designed for TH350 Transmissions from 1969 and up.
This kit includes an outer oring, an inside rubber gear seal, and a c-wire clip. These parts work together to stop leaks and keep your speedometer working right. It fits larger speedo housings for 34-45 tooth gears.
This kit does not fit smaller “bullet” speedo housings. It’s easy to install and saves you time and money. Keep your transmission leak-free with this reliable solution.
| Pros | Cons |
|---|---|
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Perfect For:
This leak stop kit is perfect for car owners with a TH350 transmission who want to fix a leaky speedometer housing. It’s easy to use and stops leaks fast.
Ready to Purchase?
Buying Guide
Speedometer housing leaks can ruin your driving experience. Fixing them is easy with the right seal kit.
Choosing the best speedo housing seal can save you time and money. It keeps your transmission leak-free and your speedometer accurate. Here’s what to consider:
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Compatibility:
Make sure the seal kit fits your transmission model. Check for specific compatibility with your vehicle’s make and year. -
Material Quality:
Look for high-quality materials like nitrile rubber or stainless steel. They offer durability and chemical resistance. -
Included Parts:
Choose a kit with all necessary components. This includes seals, bolts, and retainer clips for a complete repair. -
Ease of Installation:
Pick a kit that’s simple to install. Clear instructions and preinstalled parts make the job quick and easy. -
Warranty and Support:
Opt for kits with a warranty and customer service. This ensures reliability and help if needed. -
Leak Protection:
Ensure the kit includes tight seals and O-rings. These parts prevent leaks and keep fluid inside. -
Price and Value:
Compare prices for the best value. A durable and reliable kit is worth the investment.
With these factors in mind, you’ll find the perfect speedo housing seal for your needs. Enjoy a leak-free and accurate driving experience!