TREMEC GM TKX Road Race 5-Speed | 2.87 First, 0.81 OD

Key Features

• 600 lb-ft torque capacity with 7,500 RPM shift capability and 8,000 RPM engine speed rating
• Close-ratio gearing (2.87, 1.89, 1.28, 1.00, 0.81) balances strong launches with relaxed highway cruising
• 26-spline input shaft (1-1/8 in. diameter) and 31-spline output shaft for added strength
• Compact end-loaded aluminum case fits most GM tunnels without floor modifications
• Ribbed 3-piece housing (main case, intermediate plate, rear extension) for structural stiffness
• Multi-cone synchronizers with sintered carbon/bronze hybrid rings for smooth high-RPM shifts
• ASTM 4615 special-grade steel gears and shafts with caged needle bearings in all gear positions
• GM Muncie bellhousing bolt pattern - direct swap for 3-speed and 4-speed applications
• GM 0.590-inch pilot tip with 1.375-inch OD throwout bearing guide tube
• Built-in reverse light switch and cruise control safety switch
• Dual speedometer outputs: mechanical 7-tooth Ford gear (adaptable to GM) plus OSS two-wire analog sensor
• 99 lbs dry weight; 2.7-quart fluid capacity
• High-performance short-throw billet aluminum shifter included
• Shifter Stub Location: 19.52” back from the bellhousing face with No Offset

Description

When your classic GM muscle car is making north of 400 horsepower and that antiquated 4-speed is holding you back, the TREMEC TKX delivers the overdrive upgrade you need. Unlike transmissions repurposed from OEM applications, the TKX was designed, tested, and built from the ground up specifically for the aftermarket. The result is a purpose-built 5-speed that combines universal packaging with the durability and shift quality that high-horsepower restomods demand.

The engineering focus shows in every component. All gears and shafts are machined from special-grade ASTM 4615 steel for increased torque-carrying capacity. Sintered carbon/bronze hybrid triple-cone synchronizers deliver smooth, precise shifts even at 7,500 RPM. The gear layout is optimized to minimize noise, vibration, and harshness while oversized gear widths and caged needle bearings in all gear positions maximize durability. A ribbed three-piece aluminum housing provides outstanding structural stiffness while keeping weight down to just 99 lbs dry.

The compact end-loaded case design clears most GM A-body transmission tunnels without cutting - Chevelle, GTO, Cutlass, Nova, and Camaro applications typically bolt right in. Three shifter positions offer flexibility for factory console alignment, and the low-profile shifter plate keeps everything tight. This close-ratio 2.87:1 first gear with 0.81:1 overdrive fifth provides strong acceleration while dropping highway RPM for comfortable cruising and improved fuel efficiency.

Bolts directly to existing GM Muncie bellhousings or Quicktime SFI-approved bellhousings. The GM-pattern input features a 0.590 in. pilot tip and 1.375 in. OD throwout bearing guide tube. Gaskets at all mating surfaces eliminate fluid leaks and simplify installation. MDL backs every transmission with an extended warranty and lifetime technical support.

Kit Includes

• TREMEC TKX 5-speed transmission assembly (TCET17722)
• High-performance short-throw billet aluminum shifter
• Reverse light switch (built-in, left side of case)
• Cruise control safety switch provision (right side of case)
• Mechanical speedometer drive gear (7-tooth Ford style, adaptable to GM)
• Electronic speedometer sensor (OSS two-wire analog)
• Gaskets at all mating surfaces
• MDL extended warranty and lifetime technical support

Specifications