Urban transit, school bus, and highway coach fleets count on Harper Detroit Diesel-Allison for a variety of reliable, cost-efficient Detroit Diesel engines and Allison transmissions.
Allison electronically controlled automatic transmissions can improve operating efficiencies, return better fuel consumption, and lower overall life cycle costs. Their durability leads to better resale values and their ease of operation reduces driver-training time.
Allison Automatic Transmissions provide smooth,
full-power shifts for a more comfortable ride in passenger applications.
The B series transmissions feature externally accessible oil filters to
make scheduled fluid and filter changes quick and simple. The Allison
Torque converter/planetary gear design is well suited to bus operations.
The transmission can start the vehicle without any sudden surge and minimize
rollback on hills. The world transmission engages the lockup clutch as
early as possible to improve fuel economy and engine braking. The B300
and B400 models serve mid-range buses, while the B500 is designed for
heavier buses and engines with a higher horsepower. All B Series transmissions
are available with up to two overdrive gears for optimal fuel economy
on the highway.