Motor: Mack E7 etech elec 460 hp - rebuilt by Mack, 70,000 miles on rebuilt engine Engine Brake: Jake Transmission: RTLO16913A 13 speed PTO: air operated bottom mount with shaft to vacuum pump Rear: Eaton DS405 40,000 lbs Ratio: 3.90 Suspension: Mack 4 air bag 40,000 lbs Tires: 11R22.5 - all original Rims: 10 bolt hub pilot - aluminum on front axle Odometer Reading: 166,078 ECM: 1,166,077 Hour Meter Reading: 38,165 Computer Hour Reading: 38,163 Wheelbase: 220" Weight: 18,820 lbs GVW: 52,000 lbs Sleeper Details: air ride 64" mid roof, bunk has microwave and refridgerator, has ThermoKing Tripac Evolution APU - runs and works well Added Details: runs well, air conditioning - not working, single frame, air slide 5th wheel, PTO blower setup for pneumatic bulk trailers