For years, diesel-powered Dodge Ram pickup trucks have featured powerful inline six-cylinder engines from Cummins. By all accounts, the partnership has been successful and the Cummins diesel engines are highly regarded in the industry. Therefore, it wasn't exactly shocking to hear that the planned light duty diesel engine for the Ram 1500 pickup would be sourced from Cummins.
Not long ago, Chrysler's bankruptcy allowed the automaker to cancel contracts that were no longer desirable for the automaker moving forward. The deal with Cummins for the light duty diesel was one such contract, though later reports indicated that the deal could potentially be revived. According to an unnamed source quoted by Automotive News (sub. req'd), though, that pairing may be in jeopardy.
In place of the Cummins diesel engine may very well be an oil-burning powerplant from Fiat, the Italian automaker that recently partnered up with the Chrysler. In related news, Chrysler may possibly withdraw from its joint venture with Hyundai and Mitsubishi to produce the World Engine that's currently used in a number of Chrysler, Dodge and Jeep vehicles. As you may have guessed, the replacement powerplants would almost surely be sourced from Fiat.
[Source: Automotive News - Sub. Req'd]