March 27, 2013
To be co-released by the two companies, the new 16-speed direct drive automated mechanical transmissions are designed with a small 17 percent step between gears to optimize time in a diesel engine’s most efficient RPM zone and help reduce fuel consumption, Eaton says.
The new UltraShift PLUS LSE (linehaul small-step efficiency) will be released initially with Navistar’s proprietary MaxxForce 13L SCR engines on the International branded vehicles and followed shortly thereafter with Cummins ISX15 engines. Eaton says fleets involved with testing the new transmissions have reported fuel economy improvements from two to four percent. Production is scheduled to take place in April of this year.
“The direct drive design also boosts the efficiency of the transmission gear train, to further promote excellent fuel consumption,” says Shane Groner, North America product planning manager for Eaton’s Commercial Vehicle Transmission Division. “All of the other features and benefits of the UltraShift PLUS are included in this newest addition to our lineup.”
The new UltraShift PLUS LSE transmission has 16 forward gears and two reverse gears, and an overall ratio of 14.40. The standard warranty is 5-year/750,000 miles for the transmission and 3-year/350,000 miles for the clutch, Eaton says.
All UltraShift PLUS transmissions use an electronic clutch actuator to provide faster shifting and smoother engagement. Eaton says the clutch is fully engaged at idle, giving the driver ultimate control in challenging situations, like parking lots, loading docks and other tight spaces.