TREMEC TKX 5-Speed Conversion Package | 1969-1970 Mustang/Cougar | Manual to TKX

TREMEC TKX 5-Speed Conversion Package | 1969-1970 Mustang/Cougar | Manual to TKX

TREMEC TKX 5-Speed Conversion Package | 1969-1970 Mustang/Cougar | Manual to TKX

Description

Key Features

  • 600 lb-ft torque capacity with 8,000 RPM engine speed capability and safe shifts at 7,500 RPM
  • 26-spline input shaft and 31-spline output shaft for maximum strength
  • Compact end-loading case design fits without tunnel modifications on '69-'70 Mustang/Cougar
  • Three-piece ribbed aluminum housing provides outstanding structural stiffness
  • Multi-cone synchronizers with sintered bronze and carbon hybrid rings for smooth high-RPM shifts
  • Multiple gear ratio options: close ratio (2.87, 1.89, 1.28, 1.00, 0.68) or wide ratio (3.27, 1.98, 1.34, 1.00, 0.72)
  • Retains OEM shifter position for factory appearance and feel
  • Only 99 lbs dry weight with 2.7-quart fluid capacity
  • All gears and shafts machined from special grade ASTM 4615 steel

Description

Your '69-'70 Mustang or Cougar deserves better than that tired four-speed. This complete TREMEC TKX conversion package solves the limitations of vintage manual transmissions by delivering modern overdrive cruising, high-RPM shift capability, and 600 lb-ft of torque capacity in a compact package specifically engineered for classic Ford applications. The TKX was designed from the ground up for the aftermarket, and its streamlined case fits the Mustang tunnel without cutting or floor modifications.

The TKX represents a complete redesign versus the older TKO series. The end-loading case architecture eliminates the bulky top window of previous designs, dramatically improving case strength while reducing overall height. A structural mid-plate between the main case and extension housing adds critical mainshaft support that minimizes deflection under load. All gears and shafts are machined from special grade ASTM 4615 steel, with wide gear widths and caged needle bearings in all gear positions for exceptional durability and reduced endplay.

Where older brass synchronizers felt balky above 6,000 RPM, the TKX's multi-cone synchronizers with sintered bronze and carbon hybrid rings deliver smooth, confident shifts at up to 7,500 RPM. Special gate chamfers and ball detents for each of the three shift rails eliminate the stiff, notched shifter feel of previous five-speeds. The result is modern transmission performance that matches today's power outputs and RPM requirements.

MDL's customizable package builder walks you through selecting the right components for your build. Choose your transmission gear ratio to match your rear axle and driving style, then configure the shifter, crossmember, speedometer solution, driveshaft yoke, and supporting hardware. This package is designed to place the TKX behind your OEM bellhousing with the shift lever retained in the factory position for correct appearance and ergonomics.

Kit Includes

  • TREMEC TKX 5-speed transmission (choice of gear ratios: TCET17765, TCET18085, or TCET18084)
  • Custom MDL shifter with factory position location
  • Transmission adapter for OEM bellhousing compatibility
  • Complete hardware installation kit
  • TKX-specific crossmember for '67-'73 Mustang
  • Transmission mount
  • Speedometer cable or electronic sensor (selectable)
  • Speedometer driven gear (multiple tooth counts available)
  • Speedometer gear retaining clip
  • Shift knob (multiple styles available)
  • Shift lever (multiple lengths available)
  • Shift boot (multiple materials available)
  • Drive shaft slip yoke (1310, 1330, or 1350 U-joint series, 31-spline)
  • Reverse light wiring harness
  • TREMEC HP-MTF transmission fluid (3 quarts)
  • MDL lifetime technical support
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