The 2022 Mack GR64F is a robust specialty truck designed for heavy-duty applications. It features a powerful 505 hp diesel engine with a torque of 1860 lb-ft, paired with a 12-speed automatic transmission.
This 2025 service truck, model GR64F, is equipped with a Mack MP8 6-cylinder 12.8 L diesel engine generating 415 hp, and a Mack mDrive automated transmission.