With bus engine power and torque outputs increasing, Allison Transmission announced its latest six-speed automatic models to meet European standards, ideal for bus and coach applications up to 360bhp and 1450Nm torque, at Busworld 2009 in Kortrijk Xpo, Belgium.

The new T375 and retarder derivative T375R will compliment the current offerings of Allison mid-range fully automatic transmissions, assuring coverage in this segment for new Euro 5 engines. In addition the transmission debuts key fuel saving technology features that are being rolled out across the Allison range.

"Tighter emissions control and the need to still deliver performance are pushing engine power outputs higher," says Allison's european marketing manager Manlio Alvaro. "The new T375 will ensure excellent reliability and, with the very latest control technology and hardware upgrades, also increases efficiency."

The T375 and T375R also feature Allison fourth Generation Controls. These controls allow full integration with CAN-based vehicle architectures offering OEMs better powertrain control strategies. Drivetrain performance is enhanced thanks to the latest versions of Closed-loop Adaptive Logic for outstanding shift quality; auto neutral, RELS, new eco calibration and load based shifting scheduling technology for superior fuel efficiency.

As part of Allison Transmission's continuous product improvement initiative, all Allison Torqmatic transmissions are now available with prognostics that determine health of the transmission, and when a specific maintenance function is required.

Allison customers for the new T375 and T375R models will also have access to Allison's optional Extended Transmission Coverage package, providing up to five years of coverage.