Best Automatic Transmission Assemblies of 2025

The TCI StreetFighter Trans is designed for high-performance vehicles that demand speed and reliability. It features a manual/automatic valve body, allowing you to choose between manual shifting for control or automatic shifting for quick, racetrack-style gear changes. This means you can shave time off your elapsed times (ETs). With quality components and improved lubrication, this transmission offers firm shifts and increased torque capacity, enhancing your driving experience. Plus, the innovative heat dissipating technology ensures the transmission stays cool, making it ideal for powerful engines.

The TCI StreetFighter Transmission is designed for high-performance Chevrolet vehicles with 4.3 and V8 engines. With its manual/automatic valve body, you can enjoy the flexibility of manual shifting or let the transmission handle shifts automatically, enhancing your driving experience. It features upgraded clutches and bands that provide increased torque capacity, ensuring more power when you need it. The improved lubrication system keeps the transmission running smoothly by sending more fluid to critical parts. Additionally, TCI’s unique heat-dissipating technology ensures that your transmission stays cool during intense driving.

The Speedway SoloSwap Transmission is a lightweight and durable mock-up transmission designed for easy handling and precise project planning. Weighing only 17.5 pounds, it's effortless to position without assistance. Compatible with various GM engines, including LS series, it's perfect for a wide range of swap projects. Constructed from robust 12-gauge steel, it ensures longevity and can be conveniently stored assembled or disassembled. Ideal for confirming crucial aspects like driveshaft length and shifter location, this mock-up transmission aids in accurate project planning.

The Transmission Depot 2004R is designed to enhance your vehicle's performance, offering a free torque converter that ensures smooth and efficient power transfer. With a two-year warranty, you can drive with confidence knowing that you're covered in case of any issues. Backed by 30 years of experience, this product promises reliability and quality. Plus, with worldwide shipping, you can easily get this high-performance transmission delivered right to your door, no matter where you are.

The Cub Cadet Transmission is an essential OEM part designed for various Enduro models, including the XT1 and XT2 series. It replaces several part numbers, ensuring compatibility and ease of installation for users. This automatic transmission assembly enhances your tractor's performance, providing smooth operation and reliable functionality. By fitting multiple models, it offers flexibility, allowing you to maintain your equipment without hassle. With this assembly, you can expect increased efficiency and extended lifespan for your tractor, making your lawn care tasks much easier.

The TCI StreetFighter Transmission is designed for high-performance vehicles with horsepower ranging from 400 to 675 HP. It features a manual/automatic valve body, giving you the flexibility to manually shift or let the system handle shifts automatically, enhancing your driving experience. With specialized clutches and bands, this transmission provides improved torque capacity and ensures firmer shifts. Additionally, the innovative lubrication system keeps vital components well-oiled, promoting efficiency and longevity. The heat-dissipating technology further protects the transmission from overheating, ensuring optimal performance on the road or track.

The Turbo 400 Transmission from Transmission Depot offers great benefits for your vehicle. It comes with a complimentary torque converter, ensuring you have everything you need for a smooth installation. With a two-year warranty, you can drive with peace of mind, knowing you're covered in case of any issues. Having been in business for 30 years, this brand has a proven track record of reliability and quality. Additionally, they provide worldwide shipping, making it convenient for you to get this transmission no matter where you are located.

The ROP Shop T7510 Transmission is a reliable replacement option for various Peerless models, including the 700-070 series. This transmission is designed for easy installation in 5-speed walk-behind machines with 9-spline transmissions, ensuring that you can get back to work quickly. It comes complete with everything you need, as shown in the product images. Before purchasing, it's important to verify your part or model number to ensure compatibility, as this transmission may replace several part numbers, providing flexibility for your needs.

The Ford T-5 Transmission is a high-quality auto part designed to enhance your vehicle's performance. It comes in a substantial package measuring 39.0 inches long, 19.0 inches wide, and 14.0 inches high, making it easy to transport and store. Weighing 85 pounds, this durable transmission assembly is built to last, ensuring reliability on the road. As part of Ford's automatic transmission assemblies, it brings convenience and efficiency to your driving experience, allowing you to enjoy smooth gear shifts and improved handling.

The CWDA TCM Module is designed to enhance the performance of your vehicle's transmission system. It is compatible with various models, including the 2008-2017 Chevy Equinox and 2013-2019 Cadillac XTS. This module comes with a list of replaceable part numbers, ensuring a perfect fit for your car. Before purchasing, you can easily verify compatibility by checking the model and manufacturer number, which provides confidence in your selection. Plus, it includes a 12-month warranty, giving you peace of mind in case any issues arise.