2027 Mack GR64B

Utility centers on oil field winch work and short-cycle vocational duty, with low mileage pointing to early service life and minimal wear-in. GVWR at 66,000 with a tandem and 20k front, 46k rears fits heavier chassis loads, with drum brakes aligning with vocational maintenance routines and contamination tolerance. Powertrain pairs a Mack MP7 rated at 355 hp with an Allison 3000 RDS Gen6 6-speed automatic, a combination that favors controlled low-speed pulls, frequent starts, and consistent shift behavior over long grade efficiency. Rear ratio at 4.80 supports torque multiplication and slow-speed work, and the PTO provision is the critical interface for winch and hydraulic drive planning. Frame and stance show a 253-inch wheelbase and day cab layout, a practical footprint for tight lease roads and service yards while keeping overall length manageable. Rear suspension is Mack mRIDE 46 parabolic 3-leaf at 46,000 lb standard duty, a setup that typically balances ride compliance with load stability, and it is worth confirming bushing condition and ride height once body and winch loads are installed. Identification points include serial 1M2GR2GC9VM056739 and stock 71943 for build verification and warranty tracking. Driveline and PTO hookups should be checked for correct flange patterns, clearance to crossmembers, and any upfitter provisions before winch integration, since those details drive install time and long-term service access.