Semi Truck

Mack 5 Speed 1076/1078 Triple Countershaft Transmission

  • All New Billet Gears
  • All New Billet Shafts
  • Converts Mack 5 Speed To 4 Usable Gear Ratios
  • Input Shaft Available In Std, +.800, +1.300 Lengths
  • Output Shaft 46 Spline‚Äč