| NPR ECO-MAX Specifications | |
| GVWR/GCWR | 12,000/18,000 lbs. |
| Body/Payload Allowance | 6,315-6,453 lbs. |
| GAWR | |
| -Front | 5,360 lbs. |
| -Rear | 8,840 lbs. |
| Front Axle Capacity | 6,830 lbs. |
| Rear Axle Capacity | 11,020 lbs. |
| -Ratio | 5.125 |
| Suspension, Front & Rear | |
| -F/R Springs | Tapered/Multi-Leaf |
| -Capacity | 6,830/9,880 lbs. |
| Frame | |
| -Section Modulus | 6.07 in.3 |
| -Resistance Bending Moment | 267,080 lbs.-ft./in. |
| Service Brakes | Vacuum/Hydraulic with 4-Channel ABS |
| -Front/Rear | Disc/Drum |
| Exhaust Brake | Standard |
| Transmission | |
| -Standard | Aisin A460 6-speed auto with double overdrive and lock-up 2nd-6th gears |
| -Optional | N/A |
| Engine | Isuzu 4JJ1-TC turbocharged intercooled diesel |
| -Displacement | 3.0 L (183 in.3) |
| -Engine Power | 150 HP @ 2,800 rpm |
| -Engine Torque | 282 lbs./ft. @ 1,600-2,800 rpm |
| -Oil Level Indicator | Dash-mounted oil level check switch and light |
| Limited Slip Differential | Optional |
| Alternator | 110-amp |
| Batteries | 2 Maintenance-Free, 750-CCA |
| Tires | 215/85R-16E (10-ply) |
| Steering | Integral Hydraulic Power |
| Steering Column | Tilt & Telescopic |
| Fuel Tank | |
| -Standard | 25 Gal. in-rail |
| -Optional | N/A |
| Fuel/Water Separator | Dual fuel filter with dash-mounted indicator light. |
| Dimensions | |
| -Wheelbase (in.) | 110.0, 133.7, 151.4 |
| -Cab to Axle (in.) | 87.6, 111.2, 128.9 |
| -Cab to End of Frame(in.) | 129.8, 153.5, 171.2 |
| -Back of Cab (in.) | 4.5 |
| -Overall Length (in.) | 200.6, 224.3, 242.0 |
| -Body Length (ft.) | 10-12, 14, 16-18 |
| -Overall Width (in.) | 81.3 |
| -Axle Width (in.) | 65.6 |
| -Overall Height (in.) | 90.8 |