TREMEC TKX Conversion Package | 1987-1993 Mustang | LS Swap

TREMEC TKX Conversion Package | 1987-1993 Mustang | LS Swap

TREMEC TKX Conversion Package | 1987-1993 Mustang | LS Swap

Description

Key Features

  • 600 lb-ft torque capacity handles LS power with confidence
  • 26-spline input shaft with 31-spline output shaft for maximum drivetrain strength
  • Safe shifting to 7,500 RPM with multi-cone carbon/bronze hybrid synchronizers
  • Compact end-loaded case design fits Fox Body tunnels without floor modifications
  • Fully customizable package builder - select only the components your build requires
  • LS-specific bellhousing, crossmember, and hydraulic or cable clutch system options included
  • Multiple gear ratio configurations: wide-ratio (3.27 first) or close-ratio (2.87 first)
  • Three-piece ribbed aluminum housing provides structural stiffness and reduced NVH
  • Built-in reverse light switch and cruise control safety switch

Description

Swapping an LS V8 into your '87-'93 Mustang while upgrading from a worn T5 creates a unique set of challenges - you need a transmission that matches GM's bellhousing pattern, fits the Fox Body tunnel, and handles modern LS power levels. MDL's customizable TKX package solves every one of these problems with a complete, application-specific kit that eliminates the parts-bin guesswork from cross-platform builds.

The TREMEC TKX delivers 600 lb-ft torque capacity and handles engine speeds up to 8,000 RPM with safe shifts at 7,500 RPM - more than enough for built LS combinations. TREMEC engineered this 5-speed from the ground up specifically for the aftermarket, featuring a compact end-loaded case that fits within narrow transmission tunnels like the Fox Body without floor modifications. The three-piece ribbed aluminum housing (main case, intermediate plate, and extension housing) provides outstanding structural stiffness while minimizing noise, vibration, and harshness. Multi-cone synchronizers with sintered bronze and carbon hybrid rings deliver smooth, precise shifts even at high RPM, a significant improvement over the brass synchros in older 5-speeds.

Our guided package selection walks you through every component choice - from transmission gear ratios to clutch systems, crossmembers to driveline hardware. The 26-spline input shaft pairs with a 31-spline output shaft for maximum strength, and the integrated GM and Ford mounting patterns simplify installation. Each package includes the LS-specific bellhousing that bridges the gap between Chevy's V8 architecture and your Mustang chassis, plus all the supporting hardware to make this cross-platform swap successful.

What's Included

Components selected during package configuration based on your specific build requirements:

  • TREMEC TKX 5-speed transmission (wide or close-ratio configurations available)
  • LS-to-TKX aluminum bellhousing
  • Bellhousing clutch fork
  • TKX-specific hardware and fastener kit
  • Flywheel bolt set (multiple options)
  • Pressure plate bolt set
  • Clutch kit (multiple disc materials and torque ratings available)
  • Pilot bearing
  • Throwout bearing
  • Clutch cable kit with clips (if cable actuated)
  • Clutch pedal pads (quantity 2)
  • Shift knob (multiple styles available)
  • Shift boot
  • Speedometer gear or electronic sensor
  • Speedometer gear retaining clip
  • Transmission crossmember
  • Transmission mount
  • Reverse light wiring harness
  • TREMEC HP-MTF transmission fluid (3 quarts)
  • 31-spline slip yoke (1310, 1330, or 1350 U-joint sizes available)
  • Complete installation guidance
  • Lifetime MDL technical support
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Final step

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