Description
Product Overview
The TRANSGO TH350 Valve Body Rebuild Kit is engineered for technicians and enthusiasts who demand a reliable, high‑quality solution for restoring a TH350 transmission. Constructed from robust metal, the kit includes every component required to reassemble the valve body, ensuring a tight seal and long‑term durability. Key specifications include a 1‑inch threaded inlet, a 1‑inch flare outlet, and a precision‑machined 3‑port globe valve that regulates hydraulic pressure with minimal lag. The package weighs 1.95 pounds and measures 15.4 x 11.2 x 2.5 inches, making it easy to handle during installation.
Usage
This kit is designed for use in a wide range of vehicles equipped with the TH350 automatic transmission, from classic American muscle cars to modern trucks. Whether you are performing a routine rebuild, addressing shifting issues, or upgrading the shift characteristics, the kit’s threaded inlet and flare outlet connections simplify the assembly process and reduce the risk of leaks. It is especially beneficial for DIY mechanics who prefer a comprehensive, all‑in‑one solution, as well as professional shops that need consistent, repeatable results.

Why Choose Us
TRANSGO has a reputation for precision engineering and rigorous quality control. Each component in the rebuild kit undergoes strict testing to meet OEM standards, guaranteeing compatibility and performance. The metal construction resists corrosion and wear, extending the service life of the valve body far beyond standard aftermarket options. Additionally, the kit includes an upgraded shift kit that refines shift timing and firmness, delivering a more responsive driving experience without the need for further modifications.
Key Features
- Comprehensive kit with every part needed for a full TH350 valve body rebuild.
- Durable metal construction ensures resistance to wear and corrosion.
- 3‑port globe valve provides smooth, efficient fluid flow for optimal shift quality.
- Threaded inlet and flare outlet connections simplify installation and prevent leaks.
- Upgraded shift kit enhances shifting smoothness and responsiveness.
FAQ
What vehicles are compatible with this kit?
The kit is compatible with any vehicle that uses the TH350 automatic transmission, including many Chevrolet, GMC, and Cadillac models from the 1980s and 1990s.
Do I need any special tools to install the kit?
Standard hand tools such as wrenches, screwdrivers, and a torque wrench are sufficient. The threaded inlet and flare outlet are designed for easy hand‑tightening, but a torque wrench ensures the proper seal torque.
Is the kit covered by a warranty?
Yes, TRANSGO offers a one‑year limited warranty covering manufacturing defects. Register the product on the TRANSGO website to activate the warranty.
Can I use this kit to improve shift performance?
Absolutely. The included upgraded shift kit is calibrated to provide quicker, firmer shifts, which can enhance both performance driving and everyday drivability.
How does the 3‑port globe valve differ from stock?
The 3‑port globe valve is precision‑machined to reduce internal turbulence, resulting in more consistent hydraulic pressure and smoother gear changes compared to the original stock valve.




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