SROD to TKX Conversion Package | 1982-1986 Mustang

SROD to TKX Conversion Package | 1982-1986 Mustang

SROD to TKX Conversion Package | 1982-1986 Mustang

Description

Key Features

  • 600 lb-ft torque capacity -- more than double the SROD's approximately 250 lb-ft rating
  • 8,000 RPM redline with safe shifts at 7,500 RPM -- far exceeding stock SROD limitations
  • Multiple gear ratio options: 3.27:1 or 2.87:1 first gear with 0.68, 0.72, or 0.81 overdrive ratios
  • Direct bolt-in replacement -- uses same Ford bellhousing bolt pattern as your SROD
  • Multi-cone synchronizers with sintered bronze/carbon-fiber hybrid construction for smooth, high-RPM shifts
  • 26-spline input shaft with 31-spline output shaft for increased strength over SROD internals
  • Compact three-piece aluminum housing designed for Fox Body tunnel clearance
  • Fully customizable package builder -- select transmission, clutch, flywheel, shifter, and driveline components to match your build

Description

The SROD (Single Rail Overdrive) served its purpose in early '80s Fox Bodies, but its approximately 250 lb-ft torque capacity and four-speed architecture make it wholly inadequate for modern performance builds. This complete TREMEC TKX conversion package replaces your dated 4-speed overdrive with a purpose-built 5-speed that more than doubles your torque handling capability while adding a true fifth gear for optimized highway cruising.

The TKX represents TREMEC's ground-up aftermarket transmission design. All gears and shafts are manufactured from special-grade ASTM 4615 steel for maximum durability under high-torque loads. The hybrid synchronizer system -- featuring sintered bronze and carbon-fiber construction with multi-cone engagement -- eliminates the notchy, balky shifting that plagued the SROD at elevated RPM. Three shifter locations and an internal three-rail shift system with steel shift forks provide precise gear selection regardless of where you position the lever.

Since the SROD and TKX share the same Ford bellhousing bolt pattern, this swap requires no adapter plates or bellhousing changes -- your existing '82-'86 Mustang bellhousing works directly. The TKX's compact end-loaded case design actually improves tunnel clearance compared to the SROD, and the 31-spline output shaft accepts readily available Ford C6-style slip yokes for straightforward driveshaft modifications.

Our guided package builder walks you through transmission selection based on your power goals. Wide-ratio versions (3.27:1 first gear) work well for street/strip applications where strong launches matter, while close-ratio configurations (2.87:1 first) suit road racing and high-RPM builds. Select from steel, aluminum, or SFI-certified flywheels, clutch systems ranging from organic street setups to high-torque performance units, and driveline components sized for the TKX's increased capability. Compatible with 1982-1986 Ford Mustang and Mercury Capri models originally equipped with SROD transmissions.

Package Includes (Customizable Selection)

  • TREMEC TKX 5-speed transmission -- choice of Ford configurations with various gear ratio options
  • Flywheel selection -- steel, billet aluminum, or SFI-certified options with 157-tooth ring gear
  • Clutch system -- pressure plate, disc, and release bearing matched to your power requirements
  • ARP flywheel and pressure plate bolt options for critical fastener upgrades
  • Shift knob selections -- Hurst classic styles, custom MDL designs, or performance racing options
  • Speedometer drive components -- driven gears, sensors, and retaining clips for accurate speed indication
  • Transmission mount and crossmember -- proper positioning hardware for Fox Body chassis
  • High-performance transmission fluid -- TREMEC HP-MTF or Dexron ATF
  • Driveshaft and slip yoke options -- 31-spline upgrades with appropriate U-joint sizing
  • Technical installation support and documentation from MDL
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