New White 2026 Mack MD6 with Stellar Service Body. Cummins ISB6.7 Engine with 280 horse power. (280 HP @ 2600RPM (GOV) 660 LB-FT US21). 6 speed automatic, Allison 2500 RDS transmission (Rugged Duty Series Gen 6 with PTO provisions). Front axle 10,000 and rear axle 21,000. Wheelbase of 151 with a rear ratio of 5.57. Single axle with Air Ride rear suspension. (Meritor MS-21-14X W/O DIFF LOCK Casing 11 MM).