(February 22, 2015) AUBURN HILLS, Mich. — Piles of snow and below-zero temperatures in Houghton, Mich., Bemidji, Minn., and other hostile winter areas are the cue for Ram Engineering to suit up and run severe cold weather and plow testing.

Every year, the dedicated truck engineering teams take advantage of the naturally reoccurring elements to reproduce the harsh environments some customers and operators experience. Although the conditions are far from humanly comfortable, those folks running a “Cold Trip” could not ask for a finer setting.

“Only a small percentage of Ram truck owners will subject their truck or van to the harshest winter conditions, but for those who do our durability testing procedures instill confidence,” said Mike Cairns, director of Ram Truck Engineering.

“When it’s minus 20 outside and I walk up to my Ram Truck on a morning of a Michigan winter, I have a sense of self-reliance and assurance that my truck will start, warm up quickly and run well because I know that we have tested and verified our trucks to perform in these harsh environments. We want every Ram customer to feel that way."



Ram Engineering conducts a multitude of lab tests at the company’s Technical Center in Michigan and full vehicle tests at the company’s two major proving grounds in Arizona and Michigan. The purpose of the Cold Trip is to run real world operational tests in extreme environments. The Cold Trip serves as the engineering team’s final validation, assuring all Ram trucks are fully capable and the components will withstand the harshest environments in the United States and Canada.

Being based in Michigan offers a naturally cold environment for testing but the northern region amplifies the experience. Houghton, Mich., not only provides below zero temps, it also is home to a testing facility dedicated to the winter bloom. The team also travels to Bemidji, Minn., to experience extreme cold, where the trucks soak in frigid below-zero temps for extended periods of time.

Slush test

When deicer is spread on the road in temperatures around 28 degrees Fahrenheit, slush can collect. Because slush is water during an in-between state of liquid and solid it can shift either way, but when the sun goes down and temperatures drop, solid has the advantage. Slush does not drip off the undercarriage. It hangs on, filling gaps and covering components.

During a hard freeze, anything covered in slush becomes encased in ice -- fuel lines, diesel exhaust fluid tanks, engine oil pan, brakes, etc. Ram engineers run trucks through 12-inch-deep slush and immediately park the truck overnight in a refrigeration facility set at minus 20 degrees. The truck is then inspected top to bottom to assure components and systems are functioning properly. Ram trucks feature dedicated systems to protect areas of potential vulnerability. For example, the diesel exhaust fluid (DEF) tank is allowed to freeze in such conditions.

The tank and lines are made of materials to allow a hard freeze without breaking. An independent heating system keeps just enough DEF above freezing temperatures to allow engine start up while meeting tailpipe emissions. Another example is the location of vent lines. Water can freeze, clogging vent lines for the axles, transmission and transfer case. Windows must continue to roll up and down. More importantly, windshield wipers and defrost mechanisms must function.

Arctic blast

Anyone who has walked across a windy parking lot in low temperature conditions knows the effects. Imagine that force at higher wind speeds and even lower temps while delivering a healthy dose of snow and ice. That’s exactly what Ram executes during the arctic blast test. Ram engineers create a convoy of trucks and drive in-line for hours on end, switching positions in the order. The leader pulls a “drag” or rake to kick up ice and snow. This test addresses performance of windshield wipers, lighting, defrost and systems related to the engine.

Snow ingestion can be particularly bad in such conditions. Similar to driving though a sandstorm, snow can pack the truck’s air filter and air box, limiting the truck's “breathing” capabilities. If the intake system is compromised it will dramatically reduce engine performance. It is important to place the engine’s air intake in a location that avoids an over exuberance of snow ingestion.

Alternatively, areas such as Arizona in the summer can create a need for the air intake to be present at the front of the truck for maximum flow of cooler air. The industry-exclusive Ram Active Air intake system addresses both scenarios. When the intake system senses extreme heat it draws cooler air from the front of the vehicle – a function that also engages at high altitudes for superior throttle response in low-oxygen environments. When conditions are wet from snow, ice or water fording, the system pulls air from an under-hood inlet, clear from snow packing and water.

Moving white stuff

Each season, Ram engineers plow more than 10,000 tons of snow to validate every system and ensure reliable operation. Moving a large amount of snow is paramount to a plow operator, which is why more than 80 percent of commercial and private plow trucks are ¾-ton or greater. Although the Ram 2500 and 3500 are very popular for such duties, Ram also sells a large number of Chassis Cab trucks for snow removal.