Model / Class
Heavy-duty Class 8 conventional truck (6×4 drivetrain typical) — designed for vocational, regional hauling, and tractor or dump configurations.
Engine
Mack E7 diesel engines (12.0 L, 6-cyl) were most common in earlier models, ranging from roughly 330 hp up to ~460 hp depending on tune and year.
1,049,330 miles.
Transmission
Manual or manual-style heavy duty transmissions (e.g., Eaton-Fuller 9-speed, 10-speed, 13-speed, 18-speed options).
Axles
Front: ~12,000–13,500 lb capacity typical.
Rear: ~38,000–46,000 lb on tandem drives.
Many trucks have ~4.17 to ~4.64 rear gear ratios depending on spec.
Suspension
Air ride or heavy-duty leaf/air combos, depending on vocational setup.
Wheelbase & Dimensions
Wheelbases vary by application: ~150″ to 202″ seen in listings.
Overall lengths often ~22′–26′ range.
GVWR / Capacity
GVWR typically around 50,000 – 56,000 lbs but can vary with configuration.
