TREMEC TKX 5-Speed Swap Package | 1978-1981 Chevelle | SB/BB Auto to Manual

TREMEC TKX 5-Speed Swap Package | 1978-1981 Chevelle | SB/BB Auto to Manual

TREMEC TKX 5-Speed Swap Package | 1978-1981 Chevelle | SB/BB Auto to Manual

Description

TREMEC TKX 5-Speed Swap Package | 1978-1981 Chevelle | SB/BB Auto to Manual

Key Features

  • 600 lb-ft torque capacity handles serious small block and big block power
  • 8,000 RPM engine speed rating with clean shifts at 7,500 RPM
  • Wide ratio (3.27, 1.98, 1.34, 1.00, 0.72) or close ratio (2.87, 1.89, 1.28, 1.00, 0.68) gear sets available
  • 26-spline input shaft and 31-spline output shaft for enhanced drivetrain strength
  • Compact end-loading case design fits G-body tunnels without modifications
  • Sintered carbon/bronze hybrid triple-cone synchronizers for smooth, precise shifts
  • High-performance short-throw billet aluminum shifter included
  • Bolts to standard GM Muncie/Richmond bellhousing pattern
  • 31-spline output accepts Ford C6-style slip yokes with 1330 or 1350 U-joints
  • Fully customizable package with guided selection for your specific build

Description

Ditch the slushbox and transform your '78-'81 Chevelle into a proper five-speed driver with this fully customizable TREMEC TKX conversion package. Designed specifically for automatic-to-manual swaps, this package includes everything you need to bolt in a modern overdrive transmission behind your Chevy small block or big block V8. The TKX's revolutionary end-loading case design delivers the slimmest 5-speed profile on the market, sliding into your G-body tunnel without the cutting and fabrication that plagued earlier five-speed swaps.

At the heart of this package is the TREMEC TKX-a transmission engineered from the ground up for the aftermarket, not adapted from an OE application. With 600 lb-ft of torque capacity and an 8,000 RPM engine speed rating, it handles everything from mild street small blocks to stout big block builds. The three-piece ribbed aluminum housing provides outstanding structural stiffness while keeping weight down. All gears and shafts are machined from special-grade ASTM 4615 steel, and tapered roller bearings on the input, output, and countershafts reduce noise and improve durability. Sintered carbon/bronze hybrid triple-cone synchronizers with a non-leading tooth profile eliminate the notchy, balky feel of older transmissions-you get clean, crisp shifts even at high RPM.

MDL's guided package selection walks you through every component choice: transmission gear ratio, bellhousing material and clutch release type, flywheel configuration for your engine's balance and bolt pattern, clutch system matched to your power level, hydraulic release components, shifter and boot options, speedometer solutions, and driveline parts. Choose wide-ratio gears (3.27 first) for street driveability and towing, or close-ratio (2.87 first) for aggressive driving and road course work. The 0.68 or 0.72 overdrive fifth gear drops cruising RPM for better highway fuel economy and reduced drivetrain wear.

The TKX uses the same bellhousing bolt pattern as the GM Muncie and Richmond four-speeds, and the transmission mount pattern matches factory four-speed locations for straightforward installation. The 2.7-quart fluid capacity keeps maintenance simple. If you have questions or want help selecting the right components for your specific combination, MDL's concierge service is available to guide you through every step.

What's Included

  • TREMEC TKX 5-speed transmission (wide or close ratio selection)
  • Bellhousing (aluminum or steel, mechanical or hydraulic release)
  • Bellhousing hardware kit (aluminum or steel bellhousing specific)
  • Flywheel (168-tooth, application and balance specific for SB or BB)
  • ARP flywheel bolts
  • Clutch set (hydraulic or mechanical release, torque rating matched)
  • Pressure plate bolts (standard or ARP)
  • Clutch pedal assembly
  • Hydraulic master cylinder kit (0.700-inch bore, firewall mount)
  • Hydraulic release bearing
  • Hydraulic line (24-inch, -4AN)
  • Polyurethane transmission mount
  • Shift knob (multiple styles and finishes available)
  • Shift lever (Hurst or MDL custom options)
  • Shift boot
  • Speedometer cable adapter or electronic sensor
  • Speedometer driven gear (tooth count matched to rear axle ratio)
  • Speedometer gear retaining clip
  • Reverse light wiring harness
  • Transmission fluid (3 quarts HP-MTF or ATF)
  • 31-spline slip yoke (1310, 1330, or 1350 U-joint series)
  • Complete installation documentation
  • Lifetime technical support from MDL
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