The Allison Bus Series are medium and heavy duty

automatic transmission An automatic transmission (sometimes abbreviated to auto or AT) is a multi-speed transmission used in internal combustion engine-based motor vehicles that does not require any input from the driver to change forward gears under normal driving ...

s for

transit bus Transit may refer to: Arts and entertainment Film * ''Transit'' (1979 film), a 1979 Israeli film * ''Transit'' (2005 film), a film produced by MTV and Staying-Alive about four people in countries in the world * ''Transit'' (2006 film), a 2006 ...

es and highway

motorcoach A coach (or coach bus/motorcoach) is a type of bus built for longer-distance service, in contrast to transit buses that are typically used within a single metropolitan region. Often used for touring, intercity, and international bus service ...

es designed and manufactured by Allison Transmission. Each of the six models in the Bus Series is available in 5 or 6 speeds with an integral hydraulic retarder as an option.

History

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. , the majority of the 5,700 buses operated by the

New York City Transit Authority The New York City Transit Authority (also known as NYCTA, the TA, or simply Transit, and branded as MTA New York City Transit) is a New York state public-benefit corporations, public-benefit corporation in the U.S. state of New York (state), New ...

are equipped with Allison B400 or B500 transmissions. File:H3-45_1352.jpg, Many coaches, such as this Prévost H3-45, use the B500R., alt= File:4th Av 87th St Bklyn td (2019-07-10) 04a.jpg, Many rigid

es, such as this

New Flyer New Flyer is a Canadian multinational bus manufacturer, specializing in the production of transit buses. New Flyer is owned by the NFI Group, a holding company for several bus manufacturers. New Flyer has several manufacturing facilities in Can ...

Xcelsior XD40, use the B400R., alt= File:Krapf Bus New Flyer Industries Midi (MD35) 1415 Phlash bus.jpg, Some smaller

midibus A midibus is a classification of single-decker minibuses which are generally larger than a traditional minibus but smaller than a full-size single decker and can be anywhere between and long. While used in many parts of the world, the mi ...

es, such as this

Midi MD35, use the B300R., alt= File:6098 M60.jpg, Many articulated buses, such as this

Xcelsior XD60, also use the B500R., alt=

Models

Allison markets its transmissions by vocational series according to the intended use; for example, the Tractor Series is sold for and installed in Class 8 tractors, while the Motorhome Series is marketed to manufacturers of recreational vehicles. A transmission is given a designation specific to the vocational series, but is otherwise identical mechanically to other transmissions sold for other vocational series; for example, the Bus Series B210 / B220 / B295 transmissions are also sold with identical gearing as: * 1000HS (Highway Series) * 1000MH (Motorhome Series) * 1000EVS (Emergency Vehicle Series) * 1000RDS (Rugged Duty Series) * 1000PTS (Pupil Transport/Shuttle Series) * 1000SP (Specialty Series) * 1350HS/MH/EVS/RDS/PTS/SP * 2100HS/MH/EVS/RDS/PTS/SP * 2200HS/MH/EVS/RDS/PTS/SP * 2350HS/MH/EVS/RDS/PTS/SP Collectively, these are grouped into the 1000/2000 Series transmission family; transmissions within a family share the same basic dimensions, power input capabilities, and weight. Allison transmission families for the Bus Series include the 1000/2000 Series (B210, B220, B295), 3000 Series (B300 / B400), and 4000 Series (B500). Within North America, Bus Series transmissions carry a "B" prefix to distinguish them from other vocational series transmissions manufactured by Allison. Outside of North America, the equivalent transmissions are designated with a "T" prefix, e.g., T3280 xFE, T3325 xFE, and T3375 xFE.

References

{{Reflist Automobile transmissions