in RE configuration only) Navistar VT365 (ICRE & ICCE only) Navistar MaxxForce DT Navistar MaxxForce 9 (IC RC only) Cummins L9 (2017- 2024) (ICRE only) Transmission Unlike the 3800 conventional, the 3000/3900 were only produced with automatic transmissions. Allison AT545 Allison MT643 Allison World Transmission (MD3060/3560) Allison 3000PTS Transmission Allison 2500 Transmission Availability See also List of buses References School bus chassis 3000 Vehicles introduced in 1990