Best Manual Transmission Assemblies of 2026

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 10, 2026

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Manual transmission assemblies are an essential component of any manual transmission system. They are responsible for transmitting power from the engine to the wheels, allowing the driver to shift gears and control the speed of the vehicle. These assemblies are made up of a variety of gears, bearings, shafts, and other components, all working together to ensure smooth and efficient operation. They are available in a range of sizes and configurations to suit different applications, from small cars to heavy-duty trucks. Whether you're building a custom vehicle or replacing a worn-out assembly, manual transmission assemblies are a vital part of any transmission system.

At a Glance: Our Top Picks

Flynsu AX-15 5-Speed Manual Transmission for Jeep 4.0L Cover #TOP 1
Flynsu AX-15 5-Speed Manual Transmission for Jeep 4.0L
ftb score rating icon 9.9
McLeod Tremec TKX 5-Speed Manual Transmission Cover #TOP 2
McLeod Tremec TKX 5-Speed Manual Transmission
ftb score rating icon 9.8
McLeod Tremec TKX 5-Speed Manual Transmission Cover #TOP 3
McLeod Tremec TKX 5-Speed Manual Transmission
ftb score rating icon 9.6

Top 10 Manual Transmission Assemblies

#TOP 1

Flynsu AX-15 5-Speed Manual Transmission for Jeep 4.0L

‎Manual Transmission 5 Speed
Flynsu AX-15 5-Speed Manual Transmission for Jeep 4.0L Cover
Flynsu AX-15 5 speed Manual Transmission Replacement for Jeep Wrangler TJ YJ 4.0L 1991-1999

The Flynsu AX-15 Transmission is designed to fit Jeep Wrangler TJ and YJ models with a 4.0L engine, making it a reliable replacement option. It matches the original equipment part number 52108047AB, ensuring it meets factory standards. This transmission is compatible with Jeep Cherokee XJ models from 1991 to 1999, so you can confidently use it for repairs or upgrades. Additionally, it fits Jeep Wrangler TJ models from 1997 to 1999, as well as older YJ models between 1991 and 1995, providing broad coverage for your Jeep repair needs.

What We Like
OE part compatibility
Fits multiple Jeep models
Reliable 5-speed manual
Direct replacement
#TOP 2

McLeod Tremec TKX 5-Speed Manual Transmission

TCET18083
Plain
McLeod Tremec TKX 5-Speed Manual Transmission Cover
McLeod TCET 18083 - Tremec Manual Transmission Assembly

The McLeod TKX Manual Transmission offers a powerful 5-speed setup designed specifically for rear-wheel-drive vehicles. With the ability to handle up to 600 lb.-ft. of torque, this transmission supports high-performance engines running at speeds up to 8,000 RPM, making it ideal for spirited driving. Its versatile design includes three different shifter locations, so you can choose the best fit for your vehicle’s interior. Plus, its compact and end-loaded construction fits most transmission tunnels without needing floor changes, providing easier installation and more space. This makes the McLeod TKX Manual Transmission a great choice for those seeking strength and convenience.

What We Like
High torque capacity
Supports high RPM engines
Multiple shifter locations
Compact design for easy fit
#TOP 3

McLeod Tremec TKX 5-Speed Manual Transmission

TCET18086
Plain
McLeod Tremec TKX 5-Speed Manual Transmission Cover
McLeod TCET 18086 - Tremec Manual Transmission Assembly

The McLeod Tremec TKX Transmission is a powerful 5-speed manual gearbox designed specifically for rear-wheel-drive vehicles. It can handle up to 600 lb.-ft. of torque, which means it’s built to support high-performance engines without breaking a sweat. You’ll appreciate its ability to work smoothly at engine speeds up to 8,000 RPM, allowing for quick, precise shifts up to 7,500 RPM. Plus, it offers flexibility with three different shifter locations, so you can choose the setup that best fits your vehicle. Its compact design fits most transmission tunnels without needing floor changes, making installation easier and more convenient for you.

What We Like
High torque capacity
Supports high RPM shifting
Multiple shifter locations
Compact design
#TOP 4

McLeod TCET 17805 Tremec Manual Transmission

TCET17805
Plain
McLeod TCET 17805 Tremec Manual Transmission Cover
McLeod TCET 17805 - Tremec Manual Transmission Assembly

The McLeod Tremec Manual Transmission offers a powerful 600 lb.-ft. torque capacity, letting you handle demanding engines with ease. It supports high engine speeds up to 8,000 RPM, allowing smooth shifts at 7,500 RPM for better performance. Its design fits various vehicles thanks to three shifter locations and a compact, end-loaded build, so you usually won’t need to modify your car’s floor. The transmission’s strong three-piece aluminum case ensures durability and prevents leaks with gasketed flanges, making installation simpler. Plus, advanced synchronizers provide smooth shifting, reducing effort and improving your driving experience.

What We Like
High torque capacity
Supports high RPM shifts
Multiple shifter locations
Durable aluminum housing
Smooth shifting technology
#TOP 5

Speedway Motors Tremec TKX 5-Speed Kit for 1949-53 Ford Flathead

91028908
Plain
Speedway Motors Tremec TKX 5-Speed Kit for 1949-53 Ford Flathead Cover
Tremec GM TKX 5-Speed to 1949-53 Compatible with Ford Flathead Engine Conversion

The Speedway Tremec TKX Kit is a complete solution that lets you easily install a Tremec 5-speed manual transmission on your 1949-53 Ford Flathead engine. This kit is designed to handle up to 600 lb-ft of torque, so it’s strong enough for even highly modified engines. It features a .68 overdrive 5th gear, which helps you enjoy smoother and more fuel-efficient highway cruising. Plus, the kit includes everything you need for installation—adapter bellhousing, clutch, flywheel, throwout bearing, and hardware—making the process straightforward and hassle-free.

What We Like
High torque capacity
Overdrive 5th gear
Complete installation kit
Compatible with Ford Flathead
#TOP 6

GLOSSY AUTO PARTS AX5 5-Speed Manual Transmission for Jeep 1994-2002

GLOSSY AUTO PARTS AX5 5-Speed Manual Transmission for Jeep 1994-2002 Cover
GLOSSY AUTO PARTS 5 Speed Manual AX5 Transmission Replacement for Jeep Wrangler YJ TJ Cherokee XJ 1994-2002 52108049

The GLOSSY AX5 Manual Transmission is designed as a reliable replacement for Jeep Wrangler YJ and TJ models from 1994 to 2002, as well as Jeep Cherokee XJ models from 1994 to 2000. This 5-speed manual transmission offers smooth shifting and control, making it easier for you to drive your Jeep confidently. The 2.5L 4-cylinder AX5 transmission with a 21-spline output ensures compatibility with your vehicle’s engine setup. Using this transmission means you get an OE part number 52108049, which matches original equipment standards for a trustworthy repair or upgrade.

What We Like
OE part number compatibility
Fits multiple Jeep models
5-speed manual control
2.5L 4-cylinder design
#TOP 7

Richmond GM 5-Speed Manual Transmission

Richmond
7020526B
Richmond GM 5-Speed Manual Transmission Cover
Richmond Transmission, Super Street, Manual, 5 Speed, 26 Input Spline, 32 Output Spline, Aluminum, GM

The Richmond GM 5-Speed is a durable manual transmission designed to handle tough driving conditions. Its gear ratios, ranging from 2.89 in first gear to 0.77 in fifth, give you smooth and efficient shifting for better control and fuel economy. The input shaft features 26 splines, ensuring a secure connection to your engine, while the 32-spline output shaft offers reliable power transfer to your wheels. This transmission is built to manage up to 600 ft-lbs of torque, making it ideal for vehicles that require strong performance and durability. With this transmission, you get both strength and smooth operation for your ride.

What We Like
Wide gear ratio range
Secure 26-spline input shaft
Strong 32-spline output shaft
Handles 600 ft-lbs torque
#TOP 8

McLeod TCET 18084 Tremec Transmission

TCET18084
Plain
McLeod TCET 18084 Tremec Transmission Cover
McLeod TCET 18084 - Tremec Manual Transmission Assembly

The McLeod Tremec Manual is built to handle tough performance needs with a 600 lb.-ft. torque capacity, letting you push your engine up to 8,000 RPMs with smooth shifts at 7,500 RPMs. Its flexible design includes three shifter positions, making it easier to fit in various vehicles without major modifications. The strong three-piece aluminum case adds durability and reduces the chance of leaks thanks to gaskets on all joints. You’ll also enjoy smoother gear changes, as it uses advanced synchronizers made from sintered bronze and carbon, which help the gears mesh more easily and quietly.

What We Like
High torque capacity
Multiple shifter locations
Durable aluminum housing
Smooth shifting synchronizers
#TOP 9

TREMEC Magnum TR-6060 6-Speed Manual Transmission

TUET11011
TREMEC Magnum TR-6060 6-Speed Manual Transmission Cover
TREMEC Transmission, Magnum, TR-6060, Manual, 6 Speed, 26 Input Spline, 31 Output Spline, Aluminum, Natural, Ford Modular, Kit

The TREMEC TR-6060 Transmission offers several benefits that enhance your driving experience. With improved fuel efficiency, you can expect to save more on gas, making it economical for daily use. It also allows for low RPM cruising, which reduces fatigue on long highway drives, so your road trips become more enjoyable. This transmission helps protect your engine by lowering wear and tear, potentially extending the life of your vehicle’s engine. Additionally, it reduces noise, vibration, and harshness, making your drives quieter and more comfortable. Overall, this transmission is designed to provide smoother, more efficient, and more enjoyable driving.

What We Like
Improved fuel efficiency
Reduced driver fatigue
Extended engine life
Lower noise and vibration
#TOP 10

Flynsu AX-5 5 Speed Manual Transmission for Jeep Wrangler

‎Manual Transmission 5 Speed
Flynsu AX-5 5 Speed Manual Transmission for Jeep Wrangler Cover
Flynsu AX-5 5 Speed Manual Transmission Replacement for Jeep Wrangler TJ YJ 2.5L 1994-2002

The Flynsu AX-5 Transmission is designed as a direct replacement for your Jeep’s manual transmission needs. It fits perfectly in Jeep Wrangler TJ and YJ models with a 2.5L engine, covering years from 1994 to 2002. This part also works with Jeep Cherokee XJ models between 1984 and 2000, giving you a versatile option for different Jeep vehicles. The transmission comes with the original equipment part number 52108049, ensuring compatibility and reliable performance. This means you get a smooth shifting experience and maintain your Jeep’s original driving feel without hassle.

What We Like
Wide vehicle compatibility
OE part number included
Smooth 5-speed manual shifting
Reliable replacement part
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What are the parts of manual transmission assembly?

The major parts of a manual transmission assembly include the engine output shaft (input shaft), countershaft (layshaft), output shaft, synchronizers, dog clutches, and a clutch. These components work together to transfer torque and speed from the engine to the wheels.

2. What are the 3 shafts called inside of a manual transmission?

In a manual transmission, there are three shafts: the input shaft, countershaft (layshaft), and output shaft. These shafts house various gears and components that determine the torque and speed transmitted to the wheels. This configuration is commonly found in modern passenger cars.

3. What is included in a manual transmission rebuild?

During a manual transmission rebuild, the transmission is removed from the vehicle and disassembled. All parts are thoroughly cleaned, and worn-out components such as clutch plates, bands, seals, gaskets, and solenoids are replaced. After reassembly, the transmission is reinstalled in the vehicle.

4. How much does it cost to rebuild a manual transmission?

The cost of rebuilding a manual transmission averages around $3,000. This is significantly cheaper than replacing the entire transmission, which can cost around $6,500. However, it's important to consult with a local auto shop for an accurate estimate based on your specific vehicle and the extent of the rebuild.

5. What is included in a clutch assembly?

A clutch assembly consists of several components, including the flywheel, clutch disc, pressure plate, clutch cover, springs, and bearings. The specific configuration of a clutch assembly may vary depending on its application.

6. Is it worth rebuilding a manual transmission?

Rebuilding a manual transmission can be worth the initial cost for many people. While it can be expensive, often costing around $2,500 or more, it is still more affordable than purchasing a brand new transmission or a new vehicle altogether.

7. Which transmission part is most often replaced during a rebuild?

During a rebuild, gaskets and other rubber parts are typically replaced. Additionally, damaged moving parts may also need to be replaced for optimal performance.

8. How long do manual transmissions last?

On average, a manual transmission can last up to 120,000 miles. However, this can vary depending on factors such as maintenance, driving habits, and overall usage.

Editor's Notes

During our manual transmission assembly research, we found 24 manual transmission assembly products and shortlisted 10 quality products. We collected and analyzed 2,896 customer reviews through our big data system to write the manual transmission assemblies list. We found that most customers choose manual transmission assemblies with an average price of $1,684.90.

The manual transmission assemblies are available for purchase. We have researched hundreds of brands and picked the top brands of manual transmission assemblies, including Flynsu, McLeod, Speedway Motors, GLOSSY AUTO PARTS, Richmond. The seller of top 1 product has received honest feedback from 262 consumers with an average rating of 4.8.

Written by
Robert Reyes Avatar

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.