T5 Conversion Package | 1965-1966 Mustang 170/200ci Inline Six | 132-Tooth

T5 Conversion Package | 1965-1966 Mustang 170/200ci Inline Six | 132-Tooth

T5 Conversion Package | 1965-1966 Mustang 170/200ci Inline Six | 132-Tooth

Description

Key Features

  • TREMEC T5 five-speed with 330 ft-lb torque capacity and 2.95:1 first gear for strong launches
  • Deep 0.63:1 overdrive drops highway RPMs for improved fuel economy and quieter cruising (optional 0.73:1 available for lighter-duty 170ci applications)
  • Lightweight 75 lbs. dry weight - TREMEC's most compact transmission fits tight early Mustang tunnels
  • Retains stock three-bolt Ford bellhousing - keeps your original clutch linkage, fork, and mechanical release setup intact
  • Custom offset shifter positions correctly in factory shifter hole for stock ergonomics
  • 10-spline input shaft matches stock Ford inline-six clutch disc; 28-spline output shaft
  • Mechanical speedometer drive with selectable driven gears for accurate calibration
  • Complete bolt-in conversion - no tunnel or chassis modifications required
  • Configurable package includes transmission, shifter, crossmember, clutch options, and all installation hardware

Description

The three-speed manual in your '65-'66 Mustang inline-six was fine for city traffic in 1965, but it leaves the engine screaming on the highway and burning fuel. This complete T5 conversion package delivers five-speed overdrive performance to 1965-1966 Mustangs equipped with Ford's 170ci or 200ci inline-six engines, using the original three-bolt bellhousing pattern and 132-tooth flywheel ring gear - no bellhousing swap, no adapter plates eating up driveshaft length, no re-engineering the clutch linkage.

The heart of the package is TREMEC's proven T5 with gear ratios of 2.95/1.94/1.34/1.00/0.63. The deep 2.95:1 first gear compensates for the inline-six's modest torque output, giving you solid acceleration from a stop. The 0.63:1 overdrive fifth drops engine speed by 37% compared to direct drive, transforming highway cruising from a chore into a pleasure. For 170ci engines producing around 101-105 horsepower, MDL recommends the optional 0.73:1 fifth gear ratio to prevent lugging the smaller displacement engine at low RPMs - it still delivers meaningful overdrive without overloading the powerplant.

The engineering makes installation straightforward. Your existing three-bolt Ford bellhousing bolts directly to the T5's face plate, preserving the original mechanical clutch linkage and release bearing geometry. The custom offset shifter assembly drops into the stock shifter hole with the correct setback dimension, so your shift lever falls right where Ford intended. At 75 pounds dry, the T5 is lighter than many four-speeds and tucks into the tunnel without modification. The included crossmember (MD-6566M-CMT5) locates the transmission mount precisely for the T5's case length.

This guided package lets you configure clutch sets (8.5-inch organic or Kevlar), pedal pads, shift knobs, speedometer gears, and driveshaft yokes to match your specific build. Requires 2.75 quarts of ATF Dexron III. Compatible with 1965-1966 Ford Mustangs with 170ci (through July 1964 production) or 200ci (August 1964 onward) inline-six engines using the three-bolt bellhousing and 132-tooth flywheel.

What's Included

  • TREMEC T5 five-speed transmission (MD-552-0251) - 2.95/1.94/1.34/1.00/0.63 gear ratios, 10-spline input, 28-spline output
  • Custom offset shifter assembly (MD-88-421-204-03) - positions correctly in factory shifter opening
  • Transmission adapter (MD-401-2103) - interfaces T5 with three-bolt Ford bellhousing
  • T5-specific crossmember (MD-6566M-CMT5) - purpose-built for 1965-1966 Mustang
  • Transmission mount (MD-604-1101)
  • ARP flywheel bolts (MD-403-1001ARP)
  • Pressure plate bolts - standard (MD-403-2004) or ARP (MD-403-2004ARP) options
  • Clutch set options - 8.5-inch organic (MD-OO8.5-T5) or Kevlar (MD-KO8.5-T5)
  • Pedal pad kit options - manual brake (MD-412-6568-MB) or disc brake (MD-412-6568-DB)
  • Reverse light wiring harness (MD-700-0001)
  • Speedometer cable (MD-506-1020) with selectable driven gears (16-21 tooth options)
  • Speedometer gear retaining clip (MD-506-1029)
  • Clutch pedal bushing/bearing options available
  • 28-spline slip yoke option (MD-601-1100-28)
  • Shift knob, lever, and boot options - multiple styles and finishes available
  • Optional 0.73:1 fifth gear set (Gearset-T5-Ford-.73/.83) for conservative overdrive ratio
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