Navistar Proving Grounds Ride and Drive
An International DuraStar with an N9 engine ready to tackle the course, which consisted of a 30-percent grade and a number of sharp turns.
The International DuraStar with an N9 engine mated to an Allison transmission was configured as a wrecker.
The International DuraStar with a Cummins ISB and mated to an Allison 2500 RDS was configured as a box truck, demonstrating how it could navigate tight spots.
WT Senior Editor Chris Wolski exits the International WorkStar 4x4 after successfully navigating the off-road course. Photo: Tom McMahon
Class 8 vehicles were available to drive on an oval track, simulating ideal highway driving.
The International LoneStar with a Cummins ISX 15 matched to a Eaton Fuller 13-Speed Manual transmission.
The International DuraStar with an N9 engine was loaded with 30,000 pounds of concrete forms, giving media drivers a real-world cargo experience.
Much of the rough road and off-road course takes drivers through lush country-type roads. The proving ground was originally used to test Studebaker vehicles in the mid-20th century.
The International PayStar tackled the rough road course, which is used to test vehicles over various surfaces.
The International PayStar 5900 with Cummins ISX matched to an Eaton Fuller Manual transmission.
The International WorkStar with N10 engine and matched to a Eaton Ultra-Shift AMT also tackled the rough-road course.
An International WorkStar 7300 4x4 returns from navigating the off-road course. The vehicle was upfit as a utility truck with a boom.
The International ProStar with a Cummins ISX15 matched to a Eaton Fuller Advantage 10-Speed AMT.
A cab-eye view of the oval track at the Navistar Proving Ground.