TREMEC TKX 5-Speed Conversion Package | 1965-1970 Impala | SB/BB Chevy

TREMEC TKX 5-Speed Conversion Package | 1965-1970 Impala | SB/BB Chevy

TREMEC TKX 5-Speed Conversion Package | 1965-1970 Impala | SB/BB Chevy

Description

Key Features

  • 600 lb-ft torque capacity with 8,000 RPM capability and safe shifts at 7,500 RPM
  • Multiple TKX gear ratio options: wide ratio (3.27:1 first) or close ratio (2.87:1 first) with 0.68, 0.72, or 0.81 overdrive
  • 26-spline input shaft with 31-spline output shaft for maximum driveline strength
  • Compact end-loaded design at just 30.78 inches (GM) fits tight B-body transmission tunnels
  • Choice of aluminum or steel bellhousings for small block and big block applications
  • Complete hydraulic clutch system with internal or external slave cylinder options
  • Flywheel selections for 168-tooth applications including 383/400, 454, 502, and LS swaps
  • Three standard shifter positions with additional offset options available
  • 31-spline slip yokes available in 1310, 1330, or 1350 U-joint configurations
  • Built-in reverse light switch and electronic speedometer sensor provisions
  • 99 lbs dry weight - lightweight among high-capacity 5-speed transmissions

Description

Transform your 1965-1970 Impala from a sluggish automatic or worn three-speed into a modern performance machine with this complete TKX conversion package. The TREMEC TKX represents the latest evolution in 5-speed technology - designed from the ground up specifically for the aftermarket rather than adapted from OEM applications. This means a slimmer, more streamlined case profile engineered to fit classic transmission tunnels without the extensive floor surgery that older TKO transmissions often required.

At the heart of this package is TREMEC's TKX five-speed, rated at 600 lb-ft of torque with safe shift capability at 7,500 RPM. The transmission features a ribbed three-piece aluminum housing (main case, intermediate plate, and rear extension) that delivers outstanding structural stiffness while keeping weight to just 99 pounds dry. Multi-cone synchronizers with hybrid sintered bronze and carbon rings provide smooth, precise shifts even at high RPM, while oversized gear widths machined from ASTM 4615 special-grade steel ensure long-term durability under hard use.

This fully customizable package walks you through selecting the right components for your specific build. Choose from multiple transmission gear ratios to match your driving style and rear axle gearing. Pair it with the appropriate bellhousing for your small block or big block Chevy, select a flywheel matched to your engine's balance and bolt pattern, and complete the system with a hydraulic clutch setup that eliminates the binding and adjustment hassles of mechanical linkages. The package includes speedometer solutions, reverse light wiring, transmission mount, and high-strength 31-spline slip yokes.

Whether you're running a numbers-matching 396, a stroker 454, or planning an LS swap, this package delivers every component needed for a complete manual transmission conversion. MDL's guided package selection ensures compatibility across all components, and lifetime technical support means you'll have expert assistance from start to finish.

What's Included

  • TREMEC TKX five-speed transmission (choice of gear ratios: 2.87/0.68, 2.87/0.81, or 3.27/0.72)
  • Bellhousing - aluminum or SFI-rated steel (small block or big block pattern)
  • Bellhousing block plate
  • Bellhousing-to-transmission hardware kit (aluminum or steel fasteners)
  • Steel or billet aluminum flywheel (168-tooth, multiple balance options)
  • ARP flywheel bolts
  • Hydraulic clutch kit (single or twin-disc options rated for your application)
  • Pilot bushing
  • Pressure plate bolts (standard or ARP)
  • Hydraulic clutch pedal assembly
  • Clutch pedal pad kit
  • Hydraulic release bearing (internal or external slave cylinder)
  • 24-inch braided stainless steel hydraulic clutch line
  • Shift lever (standard or extended throw options)
  • Shift knob with thread adapter
  • Speedometer cable adapter or electronic sensor
  • Speedometer drive gear and retaining clip
  • Reverse light wiring harness
  • Polyurethane transmission mount
  • High-performance transmission fluid (3 quarts)
  • 31-spline slip yoke (1310, 1330, or 1350 U-joint size)
  • Installation instructions
  • Lifetime technical support
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