Allison Bus Series

The Allison Bus Series of medium-to-heavy duty transmissions for buses designed by Allison Transmission. Each type is available in 5 or 6 speeds with a retarder as an option. There are six models in the Bus Series. The main differences between them are listed below.

Many coaches, such as this Prévost H3-45, use the B500R.
Many rigid transit buses, such as this New Flyer Xcelsior XD40, use the B400R.
Some smaller midibuses, such as this New Flyer Midi MD35, use the B300R.
Many articulated buses, such as this New Flyer Xcelsior XD60, also use the B500R.

In 2015, Allison introduced a new model in the Bus Series. Part of the xFE (extra fuel economy) line, the B3400xFE incorporates optimized gear ratios and features the FuelSense® Max electronic control package. New gear ratios also allow the torque converter to lock up at lower speeds. The xFE transmissions boast an up to seven percent improvement in fuel economy over baseline models.[1][2][3]

Models
Type Max. Input Power Max. Input Torque Mass of Basic Model Number of Speeds Retarder? Found in
B210 164 kW/ 220 HP 576 Nm/ 425 Ft-Lb 150 kg/ 330 Lbs 5 Midibuses
B220
B300
B300R		 209 kW/280 HP 997 Nm/ 735 Ft-Lb 243 kg/535 Lbs 4, 5 or 6
B400

B400R

 224 kW/ 300 HP (transit)

242 kW/325 HP (touring coach)

 1254 Nm/ 925 Ft-Lb 243 kg/535 Lbs Transit buses (rigid)
Midsize coaches (30-35 ft long)
B3400xFE 224 kW/ 300 HP (transit) 5 or 6 Transit buses (rigid)
B500
B500R		 313 kW/ 420 HP (transit)

410 kW/550 HP (touring and intercity coach)

 1763 Nm/ 1300 Ft-Lb (transit)

2237 Nm/1650 Ft-Lb (touring and intercity coach)

 439 kg/ 968 Lbs Transit buses (articulated)
Touring/intercity coaches (40-45 ft long)

References
  1. Allison Transmission Press release. 30 April 2015.
  2. "Allison Bus Series - CPTDB Wiki". cptdb.ca. Retrieved 2020-10-05.
  3. https://www.allisontransmission.com/transmissions/models/bus-series
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