2026 Mack GR64B

Vocational chassis, rolloff duty, essentially zero-mileage use points to a fresh build intended for container work with frequent stop and go cycles and high PTO time. GVWR at 66,000 with a 20k front and 46k tandem rear sets it up for heavier hooklift style loads where front axle capacity and rear spring pack matter. Powertrain, Mack MP7 rated at 425 hp paired with an Allison 4500 RDS 6-speed automatic, favors consistent launch control, smoother low-speed maneuvering, and reduced driver workload in tight yards. Rear gearing at 3.98 leans toward pull and responsiveness over highway cruise, a practical match for rolloff routes that live in the lower speed ranges. Wheelbase, 251 inches, gives room for rolloff equipment packaging while keeping turning behavior manageable for jobsite entries. Rear suspension, Mack Camelback SS46 multileaf at 46k, is a mechanical spring setup that tolerates point loading and frame twist better than air in rough surfaces, with more road feel and less isolation. Frame and running gear, tandem axle layout and standard-duty Camelback hardware mean inspection focus should stay on hoist subframe mounting points, rear crossmember condition, and driveline angles once the rolloff body is installed. Cab and exterior, white paint and new condition reduce immediate cosmetic triage, leaving the first service interval and upfitter integration as the main early-life checkpoints.