TREMEC TKX 5-Speed Conversion Package | 1968-1969 Firebird | Console Compatible

TREMEC TKX 5-Speed Conversion Package | 1968-1969 Firebird | Console Compatible

TREMEC TKX 5-Speed Conversion Package | 1968-1969 Firebird | Console Compatible

Description

Key Features

  • 600 lb-ft torque capacity TREMEC TKX five-speed transmission - handles serious Pontiac power
  • Console-compatible custom offset shifter - maintains factory appearance in '68-'69 Firebird
  • Multiple gear ratio configurations: wide (3.27 first) or close (2.87 first) ratios available
  • 26-spline input shaft with 31-spline output shaft for added strength
  • Compact end-loaded case design fits first-gen F-body tunnels without cutting
  • 99 lbs dry weight - lightweight among high-capacity 5-speeds
  • Carbon-fiber hybrid synchronizers enable smooth shifting to 7,500 RPM
  • Three-piece ribbed aluminum housing provides outstanding structural stiffness
  • Fully customizable package - bellhousing, clutch, hydraulics, and driveline components tailored to your BOP engine

Description

Drop a modern five-speed into your '68-'69 Firebird without hacking up the tunnel or losing your factory console. This fully customizable TREMEC TKX conversion package is engineered specifically for first-gen F-body Pontiacs with Buick, Olds, or Pontiac engines - delivering 600 lb-ft of torque capacity, single-overdrive cruising efficiency, and the kind of shift quality that makes every drive more engaging.

The TKX represents TREMEC's ground-up redesign of the aftermarket five-speed. Its compact end-loaded case fits into tight first-gen tunnels that would require surgery for other transmissions. The three-piece ribbed aluminum housing delivers structural stiffness without the bulk, while gaskets at all flanges eliminate the fluid leaks that plague older designs. Under the skin, special-grade steel gears (ASTM 4615) and oversized gear widths handle serious power, and the carbon-fiber hybrid synchronizer package delivers smooth, positive shifts all the way to 7,500 RPM - a major improvement over the brass synchros in older five-speeds that got notchy above 6,000.

The key to this package is the custom offset shifter that positions the shift lever exactly where your factory console expects it. You get modern overdrive performance - lower highway RPMs, better fuel economy, reduced drivetrain wear - without any visual giveaway that you have upgraded from the original four-speed. MDL's guided package selection walks you through choosing the optimal gear ratio, bellhousing, flywheel, clutch system, hydraulic components, crossmember, and driveline hardware for your specific engine combination and performance goals.

Every component in this package is selected from MDL's curated lineup of premium manufacturers. Fluid capacity is 2.7 quarts of TREMEC-specified gear oil. Our technical support team provides concierge-level assistance to match the right parts to your project and budget - call us if you have questions at any point in the selection process.

What's Included

Components vary based on your custom selections:

  • TREMEC TKX five-speed transmission (choice of three GM gear ratio configurations)
  • Custom offset shifter for console compatibility
  • Bellhousing (aluminum or steel options for BOP applications)
  • Bellhousing block plate
  • Application-specific hardware kit
  • Flywheel (multiple Pontiac balance options)
  • Flywheel bolts (standard or ARP)
  • Clutch set with pressure plate and disc (multiple performance levels)
  • Pressure plate bolts (standard or ARP)
  • Clutch pedal assembly
  • Pedal pad kit
  • Hydraulic master cylinder kit
  • Hydraulic line
  • Hydraulic release bearing
  • Shift knob and thread adapters
  • Shift lever
  • Shift boot
  • Console emblem
  • Speedometer cable adapter and driven gear
  • Speedometer gear retaining clip
  • Electronic speedometer sensor (optional)
  • Reverse light wiring harness
  • Transmission crossmember
  • TREMEC transmission fluid (3 quarts)
  • 31-spline slip yoke (multiple U-joint series options)
  • Complete installation instructions
  • Lifetime technical support
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