Looking to upgrade your TH400 transmission? We’ve compiled a list of the best TH400 upgrades to enhance performance and reliability, offering you a smoother and more efficient driving experience.
Upgrading your TH400 transmission can boost performance and reliability. Whether you’re racing, towing, or just driving daily, the right parts make a big difference. This guide highlights the best TH400 upgrades to keep your transmission running smoothly.
We’ve tested and reviewed top products to help you choose wisely. From high-volume pumps to durable gaskets, these upgrades ensure your TH400 performs at its best. Discover how to enhance your transmission and enjoy a smoother ride.
List of Top 10 TH400 Upgrades
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HAHAHA Upgraded Chrome TH350/TH400 Turbo350/400 Transmission Dipstick, Firewall Mounted Flex Oil Dipstick, Compatible with GM/Chevy TH350/TH400 Turbo350/400 Chrome. |
This product is perfect for car owners who want a reliable and easy-to-install transmission dipstick. It’s great for GM/Chevy vehicles with TH350/TH400 transmissions. |
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TH400 8 BOLT HIGH PERFORMANCE COMPLETE HD PUMP – UPGRADED W/NEW HD PUMP GEARS… |
This TH400 8 Bolt High Performance Complete HD Pump is perfect for drivers who need extreme duty and race-ready performance. It’s ideal for high-demand vehicles that push limits. |
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BlueStars TH350 TH400 700R4 Upgraded Transmission Dipstick Tube with Flexible Stainless Braided Hose – Firewall Mount for Chevy GM SBC BBC |
This product is perfect for Chevy/GM car lovers and mechanics needing a durable, accurate dipstick for TH350, TH400, or 700R4 transmissions. Its flexible design and firewall mount suit tight engine spaces, while chrome-plated durability ensures long-term use in tough conditions. |
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93103 Transmission Pan Gasket for GM Turbo 400 TH400 3L80, Compatible with Moroso 93103, Upgraded with Steel Shim Inside, Thicker, Better Sealing, More Durable |
This 93103 Transmission Pan Gasket is perfect for car enthusiasts and mechanics who want a reliable, long-lasting solution for their GM Turbo 400 TH400 3L80 transmissions. It’s ideal for those seeking better sealing and durability without the hassle of sealants. |
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MuHize Stainless Steel Braided Transmission Cooler Line Kit (70 Inch AN-6) – High-Pressure Upgrade for GM 4L60E/4L80E/TH350/TH400/700R4 & Ford AOD/4R70W/4R100 | Leak-Proof Universal Fit |
This transmission cooler line kit is perfect for car enthusiasts and DIY mechanics who want a reliable, leak-proof upgrade for their GM or Ford vehicles. It’s easy to install and built to last, making it ideal for high-pressure systems. |
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TH400 High Volume Pump 6 Bolt W/NEW HEAVY DUTY INNER PUMP GEARS – FULLY REMANED – UPGRADED WITH ALL HD PARTS. LIFETIME WARRANTY |
This TH400 High Volume Pump is perfect for racers and heavy-duty towing. It’s fully upgraded with all heavy-duty parts and comes with a lifetime warranty. |
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93103 Transmission Pan Gasket for GM Turbo 400 TH400 3L80, Compatible with Moroso 93103,Upgrade Steel Shims Inside, Better Sealing |
This product is perfect for car owners and mechanics needing a durable, leak-proof gasket for GM Turbo 400 transmissions. It’s ideal for those wanting easy installation and long-lasting performance with steel-reinforced sealing. |
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Erchon Transmission Oil Pan Gasket Compatible with GM Turbo 400 TH400 3L80, Replacement for Moroso 93103 Upgraded Gaskets with Steel Shim Inside, Thicker and Better Sealing |
This product is perfect for car owners or mechanics working on GM Turbo 400, TH400, or 3L80 transmissions. It offers a leak-proof seal, vibration absorption, and easy reuse, making it ideal for those seeking durable, simple repairs. |
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400 Transmission Oil Pan Gasket for GM Turbo 400 TH400 3L80 Compatible with Moroso 93103 42020 Oil Pan,New Upgraded Automotive th400 Transmission Pan Seal Gaskets |
Perfect for vehicle owners with GM Turbo 400, TH400, or 3L80 transmissions needing a durable, leak-proof oil pan gasket. Ideal for DIYers and mechanics who want a reusable, easy-to-install solution that cuts down on oil leaks and frequent replacements. |
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ZONFANT Upgrade Adjustable Transmission Column Shift Linkage Kit Compatible With GM TH-200 200-4R TH-350 TH-400 4L60 4L60E 4L80E 700-R4 Transmission |
This ZONFANT Upgrade Adjustable Transmission Column Shift Linkage Kit is perfect for car enthusiasts and DIY mechanics who need a reliable and durable shift linkage for their GM transmission. It’s easy to install and fits many aftermarket steering columns, making it a great choice for upgrades or repairs. |
Detailed Reviews
Upgrading your TH400 transmission? We’ve tested and ranked the top 10 upgrades to boost performance and durability. From leak-proof dipsticks to heavy-duty pumps and adjustable shift linkages, each pick is proven to deliver results. Steel-shimmed gaskets and braided cooler lines ensure reliability, while race-ready pumps handle extreme power. Find your perfect match here—no guesswork, just proven upgrades that work.
1. HAHAHA Upgraded Chrome TH350/TH400 Turbo350/400 Transmission Dipstick, Firewall Mounted Flex Oil Dipstick, Compatible with GM/Chevy TH350/TH400 Turbo350/400 Chrome.
This HAHAHA Upgraded Chrome TH350/TH400 Transmission Dipstick fits GM/Chevy vehicles with TH350/TH400 transmissions. It gives precise fluid level readings for smooth transmission performance. The chrome-plated design resists rust and adds a shiny, clean look under the hood.
The dipstick mounts securely on the firewall for quick access and accurate checks. Its flexible body bends to reach tight spots without leaks or errors.
Installation is easy—no extra parts or tweaks needed. It meets factory specs for hassle-free use. The durable build ensures long-lasting reliability in daily driving or heavy-duty tasks.
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Perfect For:
This product is perfect for car owners who want a reliable and easy-to-install transmission dipstick. It’s great for GM/Chevy vehicles with TH350/TH400 transmissions.
Ready to Purchase?
2. TH400 8 BOLT HIGH PERFORMANCE COMPLETE HD PUMP – UPGRADED W/NEW HD PUMP GEARS…
The TH400 8 Bolt High Performance Complete HD Pump is a powerful upgrade for your vehicle. It features an all-new, high-volume pump designed for extreme duty performance. This pump is race-modified, ensuring it can handle the toughest conditions.
With its upgraded HD pump gears, this product delivers superior reliability and enhanced durability. It’s the perfect choice for those seeking maximum performance from their transmission.
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Perfect For:
This TH400 8 Bolt High Performance Complete HD Pump is perfect for drivers who need extreme duty and race-ready performance. It’s ideal for high-demand vehicles that push limits.
Ready to Purchase?
3. BlueStars TH350 TH400 700R4 Upgraded Transmission Dipstick Tube with Flexible Stainless Braided Hose – Firewall Mount for Chevy GM SBC BBC
The BlueStars TH350 TH400 700R4 Upgraded Transmission Dipstick Tube is a must-have for Chevy GM SBC BBC owners. It includes a 29.5-inch flexible stainless steel dipstick with a funnel adapter tube. This kit ensures accurate fluid monitoring for your transmission.
Its firewall mount design and stainless braided hose make installation easy and secure. Plus, it comes with lifetime protection, so you’re covered for life.
| Pros | Cons |
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Perfect For:
This product is perfect for Chevy/GM car lovers and mechanics needing a durable, accurate dipstick for TH350, TH400, or 700R4 transmissions. Its flexible design and firewall mount suit tight engine spaces, while chrome-plated durability ensures long-term use in tough conditions.
Ready to Purchase?
4. 93103 Transmission Pan Gasket for GM Turbo 400 TH400 3L80, Compatible with Moroso 93103, Upgraded with Steel Shim Inside, Thicker, Better Sealing, More Durable
The 93103 Transmission Pan Gasket is designed for GM Turbo 400 TH400 3L80 transmissions. It’s compatible with Moroso 93103 and upgraded for better performance.
This gasket features an internal steel sheet, making it thicker and more durable. It’s made from oil-resistant rubber and galvanized steel, ensuring a tight seal and longer life.
Installation is quick and easy, with no sealant needed. It’s reusable and offers great value over time. Satisfaction guaranteed—we’re here to help!
| Pros | Cons |
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Perfect For:
This 93103 Transmission Pan Gasket is perfect for car enthusiasts and mechanics who want a reliable, long-lasting solution for their GM Turbo 400 TH400 3L80 transmissions. It’s ideal for those seeking better sealing and durability without the hassle of sealants.
Ready to Purchase?
5. MuHize Stainless Steel Braided Transmission Cooler Line Kit (70 Inch AN-6) – High-Pressure Upgrade for GM 4L60E/4L80E/TH350/TH400/700R4 & Ford AOD/4R70W/4R100 | Leak-Proof Universal Fit
The MuHize Stainless Steel Braided Transmission Cooler Line Kit includes two 70-inch hoses and multiple adaptors for easy installation. It’s built for high-pressure use with PTFE (Teflon) cores and stainless steel braiding to resist leaks and corrosion.
This kit fits GM and Ford transmissions like 4L60E, 4L80E, and AOD. The anti-leak rubber-covered fittings ensure secure connections. Comes with all needed adaptors for quick, universal setup.
| Pros | Cons |
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Perfect For:
This transmission cooler line kit is perfect for car enthusiasts and DIY mechanics who want a reliable, leak-proof upgrade for their GM or Ford vehicles. It’s easy to install and built to last, making it ideal for high-pressure systems.
Ready to Purchase?
6. TH400 High Volume Pump 6 Bolt W/NEW HEAVY DUTY INNER PUMP GEARS – FULLY REMANED – UPGRADED WITH ALL HD PARTS. LIFETIME WARRANTY
The TH400 High Volume Pump is fully rebuilt with all-new heavy-duty parts. It’s upgraded for race and towing, ensuring top performance and durability.
This pump comes with a lifetime warranty, new gears, and seals. It’s ready for tough use right out of the box.
| Pros | Cons |
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Perfect For:
This TH400 High Volume Pump is perfect for racers and heavy-duty towing. It’s fully upgraded with all heavy-duty parts and comes with a lifetime warranty.
Ready to Purchase?
7. 93103 Transmission Pan Gasket for GM Turbo 400 TH400 3L80, Compatible with Moroso 93103,Upgrade Steel Shims Inside, Better Sealing
Upgrade your GM Turbo 400 with the 93103 Transmission Pan Gasket. Compatible with Moroso 93103, it ensures a perfect fit and dependable sealing.
This gasket is thicker and more durable than old cork or rubber types. It features a steel shim inside, made from 70 durometer rubber and a rigid steel frame.
Easy to install, no sealant needed. Long-lasting protection for your transmission. Satisfaction guaranteed.
| Pros | Cons |
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Perfect For:
This product is perfect for car owners and mechanics needing a durable, leak-proof gasket for GM Turbo 400 transmissions. It’s ideal for those wanting easy installation and long-lasting performance with steel-reinforced sealing.
Ready to Purchase?
8. Erchon Transmission Oil Pan Gasket Compatible with GM Turbo 400 TH400 3L80, Replacement for Moroso 93103 Upgraded Gaskets with Steel Shim Inside, Thicker and Better Sealing
The Erchon Transmission Oil Pan Gasket is compatible with GM Turbo 400, TH400, and 3L80. It’s a direct replacement for Moroso 93103 gaskets. This gasket ensures tight sealing and reliable performance.
Its unique steel-core design offers better rigidity and sealing than old cork or rubber gaskets. The 3/16-inch thickness reduces deformation and cracking, making it reusable and long-lasting.
Installation is quick and easy thanks to its shape-retaining design. It’s a cost-effective upgrade that reduces the need for frequent replacements.
| Pros | Cons |
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Perfect For:
This product is perfect for car owners or mechanics working on GM Turbo 400, TH400, or 3L80 transmissions. It offers a leak-proof seal, vibration absorption, and easy reuse, making it ideal for those seeking durable, simple repairs.
Ready to Purchase?
9. 400 Transmission Oil Pan Gasket for GM Turbo 400 TH400 3L80 Compatible with Moroso 93103 42020 Oil Pan,New Upgraded Automotive th400 Transmission Pan Seal Gaskets
Fix oil leaks and keep your car running smoothly with this 400 Transmission Oil Pan Gasket. It’s compatible with GM Turbo 400 TH400 3L80 transmissions and works with Moroso pans. This reusable gasket is thicker and more durable than standard ones, preventing warping and cracking.
Made from premium oil-resistant rubber with a built-in steel shim, it ensures a tight seal and reduces leaks. Easy to install, it aligns perfectly without needing sealant.
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Perfect For:
Perfect for vehicle owners with GM Turbo 400, TH400, or 3L80 transmissions needing a durable, leak-proof oil pan gasket. Ideal for DIYers and mechanics who want a reusable, easy-to-install solution that cuts down on oil leaks and frequent replacements.
Ready to Purchase?
10. ZONFANT Upgrade Adjustable Transmission Column Shift Linkage Kit Compatible With GM TH-200 200-4R TH-350 TH-400 4L60 4L60E 4L80E 700-R4 Transmission
The ZONFANT Upgrade Adjustable Transmission Column Shift Linkage Kit is compatible with GM TH-200, 200-4R, TH-350, TH-400, 4L60, 4L60E, 4L80E, and 700-R4 transmissions. It replaces part numbers ACA-1800 and CB5010, ensuring a perfect fit for your vehicle.
Made from premium aluminum, this kit is durable and corrosion-resistant. It includes rod ends and a 21-inch long rod, fitting many aftermarket column shift steering columns.
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Perfect For:
This ZONFANT Upgrade Adjustable Transmission Column Shift Linkage Kit is perfect for car enthusiasts and DIY mechanics who need a reliable and durable shift linkage for their GM transmission. It’s easy to install and fits many aftermarket steering columns, making it a great choice for upgrades or repairs.
Ready to Purchase?
Buying Guide
Upgrading your TH400 transmission boosts performance and reliability. Whether racing, towing, or daily driving, the right parts make a big difference. This guide highlights the best TH400 upgrades to keep your transmission running smoothly.
Factors to Consider When Buying TH400 Upgrades:
- Compatibility: Ensure the upgrade fits your specific TH400 transmission model. Check for compatibility with your vehicle’s make, model, and year.
- Durability: Look for parts made from high-quality materials like stainless steel or reinforced rubber to withstand heavy use.
- Performance: Choose upgrades that enhance fluid flow, sealing, or shifting for better transmission efficiency.
- Ease of Installation: Opt for products with straightforward installation processes, reducing the need for professional help.
- Warranty: Select upgrades with warranties for added peace of mind and long-term reliability.
- Price: Balance cost with quality to get the best value without compromising performance.
Engaging Experience:
Upgrading your TH400 is an exciting way to enhance your vehicle’s performance. With the right parts, you’ll notice smoother shifts, better reliability, and improved efficiency. Whether you’re a DIY enthusiast or a professional, these upgrades make the process rewarding and enjoyable.