MDL TREMEC GM TKX Road Race 5-Speed | 2.87 First, 0.81 OD | Front Shifter, Short Body, No Offset

Key Features

• 600 lb-ft torque capacity with 7,500 RPM shift capability and 8,000 RPM engine speed rating
• Close-ratio gear set: 2.87, 1.89, 1.28, 1.00, 0.81 (5th overdrive)
• 26-spline input shaft, 31-spline output shaft for enhanced drivetrain strength
• Compact end-loaded case design fits most GM tunnels without floor modifications
• Ribbed 3-piece aluminum housing (main case, intermediate plate, rear extension) for structural stiffness
• Multi-cone synchronizers with sintered carbon/bronze hybrid rings for smooth high-RPM shifts
• High-performance short-throw billet aluminum shifter included
• Front Mount Short Body Shifter with No Offset
• Shifter Stub Location: 12.68” back from the bellhousing face with No Offset
• GM 0.590-inch pilot tip with 1.375-inch OD throwout bearing guide tube
• ASTM 4615 special-grade steel gears and shafts with caged needle bearings in all gear positions
• Bolts directly to GM Muncie 3- and 4-speed bellhousing pattern
• 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

Description

If you're making over 400 hp and need to step up from a tired four-speed, the TREMEC TKX solves the problem with ground-up aftermarket engineering wrapped in a slim-profile case that fits classic GM tunnels without cutting. This GM-pattern TKX (TCET17722) features the close-ratio 2.87 first-gear set with 0.81 overdrive -- ideal for street rods, trucks, and muscle cars where strong acceleration matters as much as relaxed highway cruising.

TREMEC designed the TKX from scratch specifically for the aftermarket, not as a hand-me-down from OE applications. The compact end-loaded architecture places all internals in a streamlined case that clears tight transmission tunnels while delivering increased structural rigidity over side-loaded designs. Superior shift quality comes from multi-cone synchronizers with hybrid sintered carbon/bronze rings, enabling confident 7,500 RPM shifts. The internal 3-rail shift system uses steel shift forks for durability, while the gear layout is optimized to control stress levels and minimize NVH.

Durability is engineered in at every level: all gears and shafts are machined from ASTM 4615 special-grade steel, supported by caged needle bearings in all gear positions and tapered roller bearings on the input, output, and countershaft. Oversized gear widths increase torque capacity and service life. Gaskets seal all mating surfaces to eliminate leaks and simplify installation. The rear mainshaft support bushing is relocated closer to the gearbox for improved shaft support.

This transmission bolts directly to GM Muncie 3- and 4-speed bellhousings. The front shifter position locates the stick 12.68 inches from the bellhousing face with no offset -- perfect for builds requiring a forward stick location. The transmission ships with built-in reverse light and cruise control safety switches, plus dual speedometer outputs (mechanical Ford 7-tooth gear adaptable to GM applications, and OSS two-wire analog sensor). Made in the USA.

Kit Includes

• TREMEC TKX 5-speed transmission (TCET17722) with 2.87/1.89/1.28/1.00/0.81 gear ratios
• High-performance short-throw billet aluminum shifter (front position short body, no offset)
• Stamped-steel rear-position cover
• Gaskets for all mating surfaces
• Built-in reverse light switch (left side)
• Built-in cruise control safety switch (right side)
• Mechanical speedometer drive gear (7-tooth Ford pattern, adaptable to GM)
• OSS two-wire analog speedometer sensor
• MDL extended warranty: manufacturer warranty plus 1 additional year with 1-year grace period
• Lifetime technical support