2007.5-2018 DODGE RAM 6.7L CUMMINS PARTS

In the middle of 2007 Cummins launched the 24 valve 6.7L diesel engine. It was rated at 350 horsepower and 650 lb-ft of torque with the automatic transmission and a derated (purposely decreased in power) 610 lb-ft of torque for the manual transmission. The 2007 6.7L Cummins was the first truck that came with a manual transmission to be derated Usually, that was done to just trucks with automatic transmissions. Also, in 2007, the body style was changed on the Ram trucks. They had sharper lines and a more refined shape. The 6.7 Cummins was equipped with a diesel particulate filter system. This considerably reduced fuel economy as well as reliability. The early 6.7 Cummins engines were plagued with clogging DPFs. The DPF can be removed (deleted) with aftermarket upgrades BUT that would make the truck illegal if driven on the street. The standard transmission for the 2007 to 2012 Ram trucks was the 68RFE 6 speed automatic. It was much more advanced than the 48RE. It excelled in reliability, longevity and performance. You could also get one with the G56 manual transmission but these were rarer due to the decreased (derated) output. If you ever wondered when Dodge Ram became Ram Trucks (or just Ram) it was in 2010. In February of 2011, the 6.7 Cummins torque output was increased in trucks with the automatic transmission to 800 lb-ft. However, the horsepower stayed the same. In 2013, several recalibrations were necessary for the Cummins diesel engine because its unrestricted power was too much for certain vehicles. In addition, the Ram Heavy Duty diesel trucks all had a new cooling system which featured a charge air cooler, dual radiators and dual transmission coolers. Adding these new features raised the heat-rejection capacity by 25%. Part of this cooling system included a computer in the 6.7L Cummins that would trigger the “Ram Active Air” intake system which draws cooler air from the front of the truck when it senses high altitudes or extreme heat. The system uses an under-hood inlet because in wet conditions it needs a dry area of the truck that is also clear of snow packing.