Measurement Comparison of TREMEC Aftermarket Manual Transmissions

If you’re choosing a new TREMEC 5- or 6-speed manual transmission for your car or truck build, fitment is one of the important considerations. Here’s a guide that provides the critical measurements for all current TREMEC aftermarket lineup.

Each section includes dimensions to help you determine fitment or what you may have to modify on your vehicle for fitment. We’ve also included key points about each transmission to help you choose the TREMEC transmission that is best suited for how you want to use your vehicle.

TREMEC T-5 5-Speed

The TREMEC T-5 was the first modern 5-speed manual transmission used by Ford and GM in vehicles like the Fox Body Mustang and Chevrolet Camaro/Pontiac Firebird. It’s features include:

  • Compact size ideal for vintage cars and trucks with small transmission tunnels
  • Smooth and easy, low-effort shifting
  • 300 lb-ft torque capacity
  • Kits and support parts available from TREMEC Elite Distributors to aid with installation


The TREMEC TKX 5-speed was designed for easy retrofits into classic muscle cars and trucks. It has a classic 4-speed bolt pattern and a slender, high-strength aluminum case designed to fit many stock muscle car transmission tunnels without requiring modification to the tunnel.

  • High-RPM (up to 7,500) smooth shifting
  • More than 600 lb-ft torque capacity
  • Designed for multiple applications with three shifter locations
  • Superior shift-ability through use of multi-cone synchronizers and hybrid synchronizer rings made of sintered bronze and carbon
  • Robust design with internal three-rail shift system and a combination of aluminum and steel shift forks
  • Optional gear ratios make the TKX capable of handling a wide array of performance requirements

TREMEC TR-4050 5-Speed

The TREMEC TR-4050 5-speed is based on a production transmission used in a variety of OE 4×2 and 4×4 applications. It is a great choice for a variety of light-truck and SUV swaps along with regular truck duties like towing, off-roading/rock-crawling. Its features include:

  • Ideal replacement for NV4500 manual transmissions with lighter overall weight, updates and improvements
  • All five forward gears and Reverse are fully synchronized
  • Countershaft-mounted Fifth gear synchronizer reduces NVH (Noise, Vibration and Harshness) when Overdrive gear is engaged
  • Super low 6.16:1 “granny” First gear is ideal for off-roading and trucks hauling heavy loads
  • The 0.76:1 Fifth gear overdrive allows for more efficient highway speed capability with lower engine RPM
  • Six-bolt PTO mounting allows for attachment of most common PTO-driven accessories

TREMEC Magnum 6-Speed

The TREMEC Magnum 6-speed is based on the popular OE TR-6060 6-speed found in several modern high-performance vehicles. It has been a favorite among modern muscle car builds, drag racing, road racing and auto-cross vehicles for more than a decade.Its features include:

  • The T-56 style bolt pattern makes installation with various late-model engines easy
  • Double-overdrive design gives the Magnum 6-speed capability for a wide array of performance applications including high-horsepower/torque street-strip vehicles
  • Torque capacity rating of 700 lb-ft
  • 7,800 RPM shift capability
  • Optional gear ratio sets make allows you to choose a Magnum 6-speed most suited to your specific vehicle use

TREMEC Magnum-F 6-Speed

The TREMEC Magnum-F 6-speed was designed specifically as an upgrade replacement for factory-equipped T-56 4th-generation Chevrolet Camaros and Pontiac Firebirds/Trans Ams. Its featured include:

  • Straight-forward swap for 1998-2002 LS1-powered Camaros and Firebirds/Trans Ams, fitting the transmission tunnel and locating the shifter in the stock location
  • It can be swapped into 1993-1997 LT1-powered Camaros and Firebirds/Trans Ams with minimal extras needed
  • Provisions for third- and fourth-generation F-body factory torque arm mount cast into tailshaft housing
  • Ideal for other applications where T-56s were desired for their shifter location
  • Eliminates the need to hunt for used T-56s or paying for costly rebuilds
  • Gives 4th-generation F-body owners the perfect transmission upgrade that supports modern performance power levels
  • For 3rd-generation F-body owners, it allows for installation of the high-performance manual transmission third-gen owners wished their cars had from the factory
  • Also ideal for LS-swapped late-models of all varieties including A80 Supras and FD RX-7s

TREMEC Magnum XL 6-Speed

The TREMEC Magnum XL 6-speed is an extended-length version of the standard Magnum 6-speed. It is ideal for late-model applications that use performance-challenged semi-remote shifters. Featured include:

  • Ideal shifter location without problematic semi-remote shifter mechanism
  • Provides a shifter location further back in the vehicle for classic car and truck builds that desire this
  • Available in kit form for 2005-up Ford Mustangs and 2010-2015 Chevrolet Camaros that include SFI bellhousing, shifter handle and crossmember

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