4000 Series™

Allison Transmission’s 4000 Series™ is designed to make heavy-duty vehicles operate smoothly and efficiently. Allison’s 4000 Series is built for productivity and reliability to deliver both performance and fuel efficiency.


  • Close or wide ratio gearing
  • Up to seven speeds
  • 2nd reverse
  • Power Take-off available
  • Integral Output retarder
  • Advanced electronic controls