MECHANICAL Axle, 4.30 ratio (Standard on 4500 model only.) Air cleaner, heavy-duty, 11" diameter dry paper single element. Air cleaner canister standard with air restriction gauge. Back of cab location. Battery, 750 cold-cranking amps, 12-volt single, maintenance free, frame-mounted battery box Alternator, 145 amps output with integral regulator 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, 14,500 lbs. (6577 kg) Front suspension, 8,440 lbs. (3828 kg) tapered leaf, semi-elliptical steel alloy tapered leaf springs. Includes shock absorbers and stabilizer bar. Rear suspension, 12,900 lbs. (5851 kg), multi-leaf, semi-elliptical steel alloy. Includes shock absorbers Rear axle, 11,020 lbs. (4998 kg) R050, full-floating single-speed with oil lubricated rear wheel-bearings Vehicle Application Truck Fuel tank, 38.6 Gallon, (146L), rectangular fuel tank. mounted between frame rail with electric type fuel pump (mounted in tank). Through the rail fuel fill. Exhaust, single outlet --- EXTERIOR 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 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 --- Running Boards:Assist steps