TREMEC TCET18084 TKX 5-Speed Manual Transmission Close Ratio Ford

The TREMEC TCET18084 TKX 5-Speed Manual Transmission Close Ratio Ford is a premium aftermarket manual transmission engineered for Ford-powered muscle cars, classic Mustangs, Falcons, Fairlanes, Comets, hot rods, and restomod builds. Designed as the next generation of the legendary TKO series, the TKX features a slimmer case for easier installation, improved high-RPM shift quality, and exceptional durability. It is built to handle modern horsepower while fitting into classic vehicles with minimal or no transmission tunnel modifications.

The TCET18084 features a close-ratio gear set with a 2.87:1 first gear and 0.81 overdrive, making it ideal for performance street driving, autocross, road racing, and vehicles equipped with moderate rear axle ratios. Rated to handle 600 lb-ft of torque, the TKX delivers smooth shifts at engine speeds up to 7,500 RPM while supporting maximum engine speeds of 8,000 RPM. Its compact aluminum case, hybrid synchronizers, and three selectable shifter locations make it one of the most versatile manual transmissions available for Ford applications.

Features

• Genuine TREMEC TCET18084 TKX 5-Speed Manual Transmission
• Designed for Ford rear-wheel-drive applications
• Close-ratio gear set for performance driving
• Rated for 600 lb-ft of torque
• Smooth high-RPM shifting up to 7,500 RPM
• Maximum engine speed capability of 8,000 RPM
• Slim, compact aluminum housing for improved tunnel clearance
• Three selectable shifter mounting locations
• Hybrid bronze/carbon multi-cone synchronizers
• Wide alloy steel gears for increased strength
• Caged needle bearings for reduced friction and improved durability
• Mechanical and electronic speedometer outputs
• Built-in reverse light and neutral safety switch provisions
• Ideal for street performance, pro-touring, autocross, and road racing

Gear Ratios

• 1st Gear: 2.87:1
• 2nd Gear: 1.89:1
• 3rd Gear: 1.28:1
• 4th Gear: 1.00:1
• 5th Gear: 0.81:1
• Reverse: 2.56:1

Specifications

• Brand: TREMEC
• Manufacturer Part Number: TCET18084
• Model: TKX Close Ratio
• Transmission Type: 5-Speed Manual
• Application: Ford
• Drive Type: Rear-Wheel Drive
• Torque Capacity: 600 lb-ft
• Case Material: Ribbed 3-Piece Aluminum
• Dry Weight: Approximately 99 lbs
• Input Shaft Diameter: 1.125 Inches
• Input Shaft Spline Count: 26
• Output Shaft Diameter: 1.375 Inches
• Output Shaft Spline Count: 31
• Speedometer Output: Mechanical and Electronic
• Shifter Positions: 3
• Shifter Included: No
• Bellhousing Included: No
• Slip Yoke Included: No
• Fluid Capacity: 2.7 Quarts
• Recommended Fluid: TREMEC High Performance Manual Transmission Fluid (HP-MTF)

Package Includes

• TREMEC TCET18084 TKX 5-Speed Manual Transmission
• Front Bearing Retainer
• Internal Shift Components
• Shift Rail Assembly
• Installation Documentation

Bellhousing, clutch kit, flywheel, hydraulic or mechanical clutch linkage, transmission mount, crossmember, shifter, slip yoke, driveshaft, and transmission fluid are sold separately unless otherwise specified.

Recommended Applications

Ideal for:

• Ford Mustang (1965–1973)
• Ford Falcon
• Ford Fairlane
• Ford Torino
• Mercury Comet
• Mercury Cougar
• Ford Ranchero
• Ford Maverick
• Street Rods
• Restomod Builds
• Pro-Touring Cars
• Classic Ford Muscle Cars
• Small Block Ford Builds
• Big Block Ford Builds

Compatible with Ford applications using the appropriate Ford bellhousing, clutch assembly, and driveline components.

Installation Requirements

Installation may require:

• Ford-compatible bellhousing
• 26-spline clutch disc
• 31-spline slip yoke
• Transmission crossmember
• Transmission mount
• Shifter assembly
• Driveshaft modification depending on vehicle
• TREMEC HP-MTF manual transmission fluid

Professional installation is recommended to ensure proper bellhousing alignment, clutch operation, and maximum transmission performance.

Warranty

The TREMEC TCET18084 TKX 5-Speed Manual Transmission Close Ratio Ford is backed by a 1-Year Limited Warranty, covering defects in materials and workmanship under normal use and proper installation. Warranty service is provided directly through TREMEC.

Why Choose the TREMEC TCET18084 TKX?

The TREMEC TCET18084 TKX Close Ratio is the ideal transmission for Ford enthusiasts looking to combine classic driving enjoyment with modern performance. Featuring a 600 lb-ft torque capacity, 2.87:1 close-ratio first gear, 0.81 overdrive, 99-pound lightweight aluminum case, three shifter positions, and industry-leading shift quality, the TKX delivers exceptional strength, smooth operation, and outstanding drivability. Whether you’re building a weekend cruiser, pro-touring Mustang, or high-performance street machine, the TCET18084 offers the reliability and performance expected from TREMEC’s most advanced 5-speed manual transmission.