TKX 5-Speed Conversion Package | Mopar Small Block V8

TKX 5-Speed Conversion Package | Mopar Small Block V8

TKX 5-Speed Conversion Package | Mopar Small Block V8

Description

TKX 5-Speed Conversion Package | Mopar Small Block V8

Key Features

  • Complete customizable conversion package for Mopar 318, 340, and 360 small block V8 engines
  • TREMEC TKX rated at 600 lb-ft torque capacity with 8,000 RPM engine speeds and 7,500 RPM shift capability
  • Multiple gear ratio options: 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 or 0.81)
  • Compact end-loaded case design provides clearance in most transmission tunnels without floor modifications
  • 26-spline input shaft with 31-spline output shaft for added strength
  • 99 lbs dry weight with 2.7-quart fluid capacity
  • Three-piece aluminum housing provides outstanding structural stiffness with gaskets at all flanges
  • Multi-cone synchronizers with hybrid sintered bronze and carbon rings for superior high-RPM shiftability
  • Guided package selection with MDL concierge service and lifetime technical support

Description

Swap your tired Mopar 4-speed for a modern five-speed overdrive with MDL's complete TKX conversion package - the definitive solution for serious builders who want factory-quality integration without the headache of sourcing individual components. The TREMEC TKX delivers 600 lb-ft of torque capacity and represents the first five-speed transmission designed from the ground up specifically for the aftermarket, rather than adapted from OEM applications.

TREMEC engineered the TKX case specifically to fit within narrow and confined transmission tunnels, solving the fitment challenges that have plagued previous five-speed swaps into classic Mopar A-body, B-body, and E-body platforms. The compact end-loaded design and streamlined tailhousing eliminate the need for extensive tunnel modifications in most applications. With the side-mounted shifter, your stock shifter position is retained for that factory look and feel.

Internally, the TKX delivers superior shiftability at high RPMs via multi-cone synchronizers and hybrid synchronizer rings made of sintered bronze and carbon. All gears and shafts are machined from special-grade ASTM 4615 steel for increased torque carrying capacity. The three-piece aluminum housing - main case, intermediate plate, and rear extension - provides outstanding structural stiffness while gaskets at all flanges simplify installation and eliminate fluid leaks. Tapered roller bearings on input, output, and counter shafts reduce noise, while caged needle bearings support all gear positions.

This package system lets you configure every component based on your specific application. The guided selection process walks you through transmission variants, bellhousing options, flywheel choices, clutch combinations, shifter configurations, speedometer solutions, and all supporting hardware. TREMEC recommends Dexron III, GM Synchromesh, Mobil 1 Synthetic ATF, or TREMEC HP-MTF for optimal performance. Every MDL package includes comprehensive installation support and lifetime technical assistance from our team in Caldwell, Idaho.

What's Included

  • TREMEC TKX five-speed transmission (your choice of gear ratio configuration)
  • Mopar small block bellhousing - cast aluminum construction for 318/340/360 engines, accommodates 130-tooth flywheel with 10.5-inch clutch, suited for mechanical or hydraulic clutch actuation
  • Complete hardware kit with all necessary mounting bolts and fasteners
  • Flywheel - 130-tooth ring gear options for various engine balance combinations
  • ARP flywheel bolt set
  • Complete clutch set (10.5-inch diameter, 26-spline disc options available)
  • Pressure plate bolt set (standard or ARP options)
  • Pilot bearing for proper input shaft support
  • Transmission mount
  • Shift knob (multiple finish and material options)
  • Shift lever (multiple lengths and positions available)
  • Shift boot and bezel combinations
  • Speedometer cable or electronic sensor options
  • Speedometer drive gear selection (16-21 tooth options)
  • Speedo gear retaining clip
  • Reverse light wiring harness
  • Three quarts of recommended transmission fluid
  • 31-spline slip yoke (1310, 1330, or 1350 U-joint series)
  • MDL lifetime technical support
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