Peterbilt 379 Specs

by Carly Reynolds
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The Peterbilt 379 was produced from 1987 until 2007. During this period, the model evolved to utilize modern technologies and amenities to provide truckers with a comfortable semi truck for extended time on the road.

Engine Specifications

The 2007 Peterbilt 379 runs on a Caterpillar C-15 engine with 475 horsepower. The Caterpillar C-15 is a diesel engine built with the latest technology to provide semi trucks with the power they need for extended highway driving. This six-cylinder engine has a four-stroke cycle diesel and a compression ratio of 18:1. This engine runs on 10 gallons of oil and weighs about 2,890 lbs. This engine offers a variety of features, including real-time clock, electronic self-diagnostics, battery backup, cold weather startup and re-programmable operational parameters that can be set by the customer.

Physical Description

The 2007 Peterbilt 379 features a Unibilt sleeper cabin with 63 inches of space to stand up. This truck is built on a steel frame and offers a 250-inch wheel base. The steel frame and wide wheel base provide this truck with the strength and stability it needs to haul large trailers. The 22.5 LP tires are mounted on aluminum wheels. The Peterbilt features an extended front end and offers a variety of interior packages, ranging from cloth interiors to leather interiors, power steering and the cab is equipped with air conditioning. The dashboard of the cab was designed to curve toward the driver to keep all your controls close at hand.

Mechanical Specifications

The 2007 Peterbilt 379 has a front axel capacity of 12,000 lbs. and a rear axel capacity of 38,000 lbs., with a rear end ratio of 3.36. This truck features a 13-speed transmission, tandem axels and a Pete Flex Air suspension system. Fuel up with less frequency with the 100-gallon gas tank. Gas mileage varies based on the terrain driven and how much weight the truck is hauling.

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