The Tremec TKX is a 5-speed manual transmission built for high-performance and restomod applications, rated for 600 lb-ft of torque and up to 8,000 RPM. It features compact dimensions for easy fitment, smooth high-RPM shifting, multiple gear ratio options, and advanced hybrid synchronizers. Lightweight and durable, it’s ideal for classic muscle car upgrades.
Features
Tested Engine with Warranty
Hassle-Free Returns Available
Live Customer Support
Direct Fit for Your Vehicle
The TREMEC TKX is a 5-speed, rear-wheel-drive manual transmission designed for popular classic muscle car restorations and custom builds. The KX transmission is rated to handle up to 600 lb-ft of torque and supports engine speeds up to 8,000 RPM, with shift points at 7,500 RPM. Boasting a slimmer, rounded end-loaded design this transmission provides an increased clearance in most transmission tunnels. The 1st gear ranging from 2.87 to 3.27 and overdrive 5th gear options of 0.68, 0.72, or 0.81. It also features high-RPM carbon-bronze synchronizers, a short-throw billet shifter, and multiple shifter positions, making it versatile for various vehicle setups.
TKX fitment depends on your specific application, bellhousing configuration, and gear ratio selection. The TKX uses a standard Chevrolet, Ford, or Mopar bellhousing pattern depending on your application, and the driveshaft output shaft length requires verification against your specific vehicle’s tunnel dimensions. Our application review process confirms the correct TKX configuration for your specific vehicle or build before it ships.
For builders and restorers comparing a used transmission against a remanufactured transmission or a new TKX, the used OEM route delivers real value. A used TREMEC TKX transmission gives you the factory-built five-speed precision as an OEM transmission unit — the factory gear ratios, the factory synchronizer quality, the factory 600 lb-ft torque rating — at a price significantly below new purchase. Unlike a remanufactured transmission rebuilt from worn components, this is an original TREMEC-built OEM transmission that preserves the manufacturing precision the TKX is known for.
Every used TREMEC TKX transmission ships with up to a 90-day warranty and arrives within 2 to 5 business days. Installation is not included. We recommend a qualified V8 manual drivetrain specialist for this application. These are genuine TREMEC OEM units, and we stand behind every one.
Specifications
Product Type
Transmission
Transmission Type
5-Speed Manual
Drive Type
RWD
Availability
In Stock
Shipping
Nationwide Available
Use Case
Ideal for upgrades or replacements
Frequently Asked Questions
What is a Tremec TKX transmission?
The TKX is a high-performance 5-speed manual transmission rated for up to 600 lb-ft of torque. It’s designed for delivering great smooth shifting, and seamless performance. Built to handle up to 600 lb-ft of torque and 7500 RPM shifts.
How much power can a TKX handle?
The Tremec TKX is rated for up to 600 lb-ft of torque, allowing it to handle engines producing around 850 horsepower, depending on the vehicle and application.
What is the break in period for TREMEC TKX?
The break-in period for a TREMEC TKX is 500 miles of normal street driving, avoiding high RPMs or aggressive shifts.
What oil to use in TREMEC TKX?
TREMEC recommends using Dexron III/Mercon ATF for the TKX transmission. For improved performance, many enthusiasts prefer Synchromesh-style fluids like GM Synchromesh or Amsoil Manual Transmission Fluid (MTF), as long as they meet TREMEC’s specifications.
What is the spline count for the TREMEC TKX 5-speed transmission?
The TREMEC TKX 5-speed transmission features a 26-spline input shaft and a 31-spline output shaft, making it compatible with many high-performance driveline setups.
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Shipping Policy
Our shipping policy is flexible, as the shipping charges depend on the location. A few certain remote regions like CO, UT, NY, OR, & CA may have additional shipping charges or delivery fees. However, some circumstances may cause delays, but we always strive to deliver your order as quickly as possible.
Please note that all shipping times are estimates and not guaranteed. We examine all rebuilt and used engines before shipment and aim to provide high-quality used engines and transmissions. Shipping details and fees will be disclosed to consumers before any transactions are made. Our team is operational 24/7, and you can call us at +1-888-799-0188 to place an order.
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