Auto to TKX Conversion Package | 1979-1981 Mustang | Ford Small Block

Auto to TKX Conversion Package | 1979-1981 Mustang | Ford Small Block

Auto to TKX Conversion Package | 1979-1981 Mustang | Ford Small Block

Description

Key Features

  • 600 lb-ft torque capacity TREMEC TKX rated for 8,000 RPM engine speeds and 7,500 RPM shifts
  • 26-spline input shaft with 31-spline output shaft for maximum drivetrain strength
  • Compact end-loaded case design fits Fox Body tunnels without floor modifications
  • Three-piece ribbed aluminum housing delivers structural stiffness and reduced NVH
  • Multi-cone synchronizers with sintered bronze/carbon hybrid rings for smooth high-RPM shifts
  • Multiple gear ratio configurations available (wide ratio 3.27 first or close ratio 2.87 first)
  • Complete component selection from transmission to crossmember to driveshaft
  • Custom flywheel options including nodular iron, lightweight steel, aluminum, and SFI-approved variants
  • Cable clutch conversion kit with all required hardware
  • MDL concierge service for guided component selection

Description

Ditch the slushbox and transform your '79-'81 Mustang into a proper driver's car with this complete TKX conversion package. The heart of this system is the TREMEC TKX five-speed - designed from the ground up specifically for the aftermarket, not repurposed from OEM applications. Rated at 600 lb-ft of torque and capable of handling engine speeds up to 8,000 RPM with shifts at 7,500 RPM, the TKX delivers the strength and performance that automatic-to-manual swappers making serious power demand.

The TKX's compact, end-loaded design was engineered to fit classic muscle car tunnels with little to no modification - a major advantage over older five-speed options. TREMEC's three-piece ribbed aluminum housing (main case, intermediate plate, and extension housing) provides outstanding structural stiffness while optimizing noise, vibration, and harshness characteristics. All gears and shafts are machined from special-grade ASTM 4615 steel, with oversized gear widths and caged needle bearings in all gear positions for serious durability under load.

This isn't a generic parts bin - it's a curated selection process that ensures every component works in harmony with your Fox Body Mustang. You'll choose from multiple TKX gear ratio configurations, bellhousing options for Ford small block engines, flywheel choices ranging from nodular iron to lightweight aluminum and SFI-approved performance variants, complete clutch systems, plus all supporting hardware including a custom crossmember with transmission mount, cable clutch conversion kit, speedometer components, and 31-spline driveshaft hardware.

MDL's concierge service walks you through each decision point, ensuring compatibility and optimal performance for your specific build goals and budget. Whether you're assembling a weekend cruiser or a dedicated track machine, this package delivers every component you need to execute a professional-grade automatic-to-manual conversion. All TREMEC components are manufactured from 100% brand-new OEM-quality parts - no rebuilds or remanufactured units.

What's Included

  • TREMEC TKX 5-speed manual transmission (multiple gear ratio configurations available)
  • Ford small block bellhousing (aluminum or steel construction options)
  • Bellhousing block plate
  • Bellhousing-to-block installation hardware kit (aluminum or steel bellhousing specific)
  • Flywheel (nodular iron, lightweight steel, aluminum, or SFI-approved options)
  • Complete clutch system (multiple disc sizes and configurations available)
  • ARP flywheel bolt set
  • Pressure plate bolt set (ARP or standard)
  • Clutch fork and boot assembly
  • Cable clutch conversion kit with mounting hardware and cable clip
  • Speedometer driven gear and retaining clip (multiple tooth counts for calibration)
  • Electronic speedometer sensor option available
  • Shift lever assembly
  • Upper shift boot with mounting hardware
  • Transmission tunnel hump (if required)
  • Shift console
  • Clutch pedal pads (pair)
  • Custom transmission crossmember for '79-'81 Mustang
  • Transmission mount
  • TREMEC HP-MTF transmission fluid (3 quarts)
  • 31-spline slip yoke or driveshaft components (U-joint size options available)
  • Shift knob (multiple styles and finishes available)
  • Detailed installation guidance and MDL lifetime technical support
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