MECHANICAL Rear axle, 5.12 ratio Air cleaner, heavy-duty, 11" diameter dry paper single element. Air cleaner canister standard with air restriction gauge. Back of cab location. Battery, dual 750 cold-cranking amps, 12 volt, maintenance free Alternator, 140 amps Frame, ladder-type channel frame. Full C section straight frame 33.5" (85.1 cm) wide. Yield strength 44,000 psi, section modulus 7.20 cu.in. and RBM 316,800 lb-ft/in per rail. Incomplete vehicle certification Wheelbase, 150" (381.0 cm) GVWR, 17,950 lbs. (8142 kg) Front suspension, 8,440 lbs. (3828 kg) tapered leaf (Standard on 4500XD, 5500HD and 5500XD only.) Rear Suspension, 14,550 lbs. (6599 kg) (Standard on 5500HD and 5500XD only.) Rear axle, 14,550 lbs. (6600 kg) (Standard on 5500HD and 5500XD only.) Vehicle Application Truck Exhaust brake Fuel tank, 30 Gallon, (113L), rectangular fuel tank. mounted between frame rail with electric type fuel pump (mounted in tank). Through the rail fuel fill Exhaust, single horizontal outlet --- EXTERIOR Tires, front, 225/70R19.5 F 125/123 L BW HWY VAR1 (Standard on 4500XD, 5500HD and 5500XD only.) Tires, rear, 225/70R19.5 F 125/123 L BW HWY VAR1 (Standard on 4500XD, 5500HD and 5500XD only.) Glass, tinted Mirror, outside left hand and right hand dual cab mounted exterior with integral convex mirror Windshield wiper, pulse, wet arm --- ENTERTAINMENT Audio system feature, 2 speakers --- INTERIOR Cup holders Steering wheel, urethane Driver Information Center, (DIC) (monitors vital functions including diesel exhaust fluid levels (DEF), particulate matter emissions level in the diesel particulate filter (DPF), diesel particulate filter regeneration, service reminders for engine oil, transmission oil, differential oil, power steering fluid, engine oil filter, and fuel filters. The DIC provides fuel economy reporting by average, instant, and trip.) Windshield washer bottle access on passenger side dash when passenger-side door is open Storage, door pockets Lighting, interior dome Storage, seatback pockets --- SAFETY Brake, parking, cable actuated, internal expanding drum type, transmission-mounted --- Convenience:Steering wheel, tilt and telescopic Drivetrain:Drivetrain, rear-wheel drive Steering:Front axle, 6,830 lbs. (3098 kg), reverse Elliot "I"-beam includes integral hydraulic power steering. ratio 18.8-20.9:1 Brakes:Brakes, 4-wheel antilock, front disc, rear drum, dual circuit, vacuum assisted hydraulic with EBD (Electronic Brake Distribution). Disc front and self-adjust outboard mounted drum rear. Mechanical, transmission-mounted parking brake. Non-asbestos semi-metallic linings are standard. 4 channel anti-lock brake system. Wheels:Wheels, 19.5" x 6", K steel (Standard on 4500XD, 5500HD and 5500XD only.) Running Boards:Assist steps Floor Mats:Floor mats Air Conditioning:Air conditioning, single-zone manual, integral in-dash mounted Window:Windows, power Safety Features:Daytime Running Lamps