Lightweight components and driver-related upgrades were announced by Peterbilt Motors at the Mid-America Trucking Show. A web-based maintenance management system for fleets and owner-operators was also introduced.

Leading the changes is a new proprietary tandem air suspension that is 400 lb. lighter than Peterbilt's current Low Air Leaf tandem. Rated at 38,000 lb., the FLEX Air adds low chassis height and better ride to its low installed weight, according to the company. The FLEX Air is currently available on Peterbilt Models 379, 387, 385 and 378.

Starting this month, the lightweight Dana Spicer Premium-40 (DSP 40) tandem drive axle will be standard on all Peterbilt Class 8 over-the-road trucks.

Designed for higher-horsepower engines with torque ratings up to 1,850 lb.-ft., the DSP 40 features hypoid primary gearing in a full range of axle ratios. Warranty in linehaul applications is 5 yr. or 750,000 mi.

TruckCare Maintenance Manager extends Pete's popular contract PM service to the Internet, offering web access to maintenance records, service reminders and comparative parts cost analysis. The password-protected web service is offered at no charge to all customers with a current TruckCare Preventive Maintenance agreement.

Turning to drivers, Peterbilt officials announced a new agreement with Delphi Automotive Systems to offer satellite digital radio service in it premium Models 387 and 379. Delphi's ConcertClass audio system will be able to receive nationwide programming from both XM Satellite Radio and Sirius Satellite Radio subscription services.

Medium-duty drivers also get new comfort and convenience features with an announced upgrade of the Peterbilt Model 330 Class 6 and 7 truck. Changes include an extended rear window with more room for seat travel, the UltraRide seat, and more in-cab storage space.

Go to www.peterbilt.com or circle 312 on reply card.