T5 Five-Speed Conversion Package | 1955-1957 Ford Thunderbird | Y-Block

T5 Five-Speed Conversion Package | 1955-1957 Ford Thunderbird | Y-Block

T5 Five-Speed Conversion Package | 1955-1957 Ford Thunderbird | Y-Block

Description

Key Features

  • 330 lb-ft torque capacity - more than sufficient for any Y-Block 272, 292, or 312 engine combination
  • 2.95:1 first gear ratio delivers strong acceleration from a stop
  • 0.63:1 overdrive fifth gear drops highway RPM for quieter cruising and improved fuel economy
  • Weighs just 75 lbs dry - TREMEC's most compact transmission fits tight '55-'57 T-Bird engine bays
  • 10-spline input shaft and 31-spline output for proven durability
  • Complete guided package includes transmission, adapter, flywheel, clutch, and all hardware
  • Customizable component selection for speedometer drive, shift lever, and driveshaft yoke

Description

Swap your '55-'57 Thunderbird's original three-speed or Ford-O-Matic for a modern five-speed overdrive and transform the driving experience. This complete TREMEC T5 conversion package is engineered specifically for Ford Y-Block engines - 272, 292, and 312 cubic inch - with a torque capacity of 330 lb-ft that handles any stock or mildly modified Y-Block with ease. The T5's deep 0.63:1 overdrive ratio dramatically reduces highway RPM, lowering engine noise, improving fuel economy, and reducing heat buildup on long cruises.

MDL's package approach eliminates the guesswork and parts-chasing headaches. The TREMEC T5 delivers smooth shifting, light pedal effort, and excellent street manners - characteristics that have made it a favorite among hot rodders and kit car builders for decades. At just 75 pounds dry, it's the most compact transmission in TREMEC's lineup, making it ideal for the limited space in early Thunderbird engine bays. The 2.95:1 first gear provides strong launch performance without excessive gear hunting around town.

Our guided package selection walks you through every component decision: bellhousing adapter, flywheel, clutch kit, speedometer solution, shifter, and driveshaft yoke. Each option has been vetted for compatibility with your specific application. Note that if your T-Bird was originally a manual floor shift, cutting a new shift hole in the floor will be required to accommodate the T5's shifter location.

Professional installation is recommended. MDL provides lifetime technical support to help you through the conversion process. If you have questions at any point, our team is available to assist with component selection and technical guidance.

Kit Includes

  • TREMEC T5 5-speed transmission (2.95:1 first gear, 0.63:1 overdrive)
  • Y-Block to T5 transmission adapter
  • Ford starter hardware kit
  • Custom Y-Block flywheel
  • ARP flywheel bolts
  • Clutch kit (choice of organic, King Cobra, or Centerforce configurations)
  • Pressure plate bolts (standard or ARP)
  • Transmission mount
  • Speedometer cable
  • Speedometer drive gear (16-21 tooth options)
  • Speedometer gear retainer clip
  • Electronic speedometer sensor (optional)
  • Shift knob (multiple color and style options)
  • Shift knob thread adapter (3/8-16 or 3/8-24)
  • Shift lever (Hurst or MDL options)
  • Shift lever bolt kits (quantity 2)
  • Shift boot (rubber or leather options)
  • ATF transmission fluid (3 quarts)
  • Driveshaft yoke (1310, 1330, or 1350 series)
  • Lifetime technical support
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