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|Manufacturer||Navistar International Corporation|
|Also called||International 4000 Series|
|Body and chassis|
|Class||Class 5 & 6|
|Wheelbase||128–254 inches (3,251–6,452 mm)|
|Predecessor||International 4000 Series (1989)|
The International DuraStar, originally introduced as the International 4000 Series, is a medium-duty truck produced by Navistar International. First produced in 2002, it is the successor to the 4000 Series of the 1990s.
It is available in three variants, which are built on the same chassis. They differ in engines, drivetrains, brakes, and cargo capacity. It is a popular commercial platform used in a wide variety of applications, such as emergency services, towing, flatbed truck and as a cargo box truck. Variants of the Durastar are commonly used as a platform for both school buses and commercial buses. The DuraStar cab is much higher off the frame than the 4400 series cab to accommodate larger radiator and engine combinations and is branded DuraStar on the doors, where the 4400 / 4300 series is marked as the 4400 or 4300, respectively. The WorkStar and DuraStar share a very similar layout, although the WorkStar is strictly a Vocational chassis. The WorkStar and DuraStar are in the class 5 / 6 (4300 / 4400) and Heavy 7 / Baby 8 (7600 series) categories from yesteryear. Although this designation is no longer used in the truck manufacturing business. The 4400 designation is still used on the 2014 class 5 / 6 trucks. The 4400 is available with the Cummins ISB6.7 and Maxxforce 7 and the Maxxforce9 is available. The WorkStar is available with the DT466 through Maxxforce 13.
The 4100 model has a wheelbase from 140" to 217", is powered by an International VT 365 and uses hydraulic brakes. It comes with an Allison 1000 HS/RDS 6-speed automatic transmission or a Fuller 6-speed manual. Its front axle capacity is 7,300 lb (3,310 kg). Rear axle capacity is 10,500 lb (4,760 kg) standard, 12,200 lb (5,530 kg) optional.
The 4300 model has a wheelbase from 128" to 254", is powered by an International DT466 and uses either hydraulic or air brakes. It comes with Fuller 6 or 7-speed manual transmissions or Allison 2000 and 3000 Series automatic transmissions. Its front axle capacity is 8000-14000 lb. Rear axle capacity is 12,200-23,000 lb.
The 4400 model has a wheelbase from 140" to 254", is powered by an International DT570 / Maxxforce 9 and uses air brakes. Transmissions include Fuller 6, 7, or 10-speed manuals, or Allison Vocational 3000 or 3500 Series automatics. Its front axle capacity is 8,000-14,000 lb. Rear single axle capacity is 13,500-26,000 lb.
The 4400 is also available as a tractor.
- Front- 8,000 - 9,000 lb (4,100 kg)
- Rear- 12,200 - 19,000 lb (8,600 kg)
- Front- 8,000 - 19,000 lb (8,600 kg)
- Rear- 13,500 - 19,000 lb (8,600 kg)
Like the 4000-series before it, the DuraStar serves as a popular platform for bus manufacturers.
- The 3200 is sold with a cab, as it is designed for cutaway-cab applications for second-stage manufacturers. It is available with the Maxxforce7 engine.
- The 3300 is sold as a cowled chassis, intended primarily for conventional-type (type C) school buses, also available with Maxxforce7 and MaxxforceDT engines.
|Engine Name||Engine Type||Horsepower||Torque||Availability|
|6.0L V8 (VT365)
6.4L V8 (MaxxForce 7)
|200-230HP||560 lbs/ft. to 620 lbs./ ft.||3200, 3300, 4100, 4300|
|MaxxForce DT/DT466||7.6L inline-6||210-255 hp||560 lbs./ft. to 660 lbs./ft.||3300, 4300, 4400|
|MaxxForce 9||9.3L inline-6||225-300 hp||620 lbs./ft. to 860 lbs./ft.||4400|
In 2007, Navistar's International Truck and Engine Corporation became the first company to enter hybrid commercial truck production, with the International DuraStar Hybrid diesel-electric truck. International Truck and Engine teamed with the Hybrid Truck Users Forum (HTUF), a consortium of utility industry customers, Eaton Corporation, the US Federal Government and the Calstart organization to assist with the cost of bringing the technology to market. It also provides direct customer feedback and support.
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