FishOnOne wrote:
I can't point you to any other resource, but about a year ago I noticed a new neighbor down my street drove a RAM 5500 oil field company truck with very large Koenig bins changed to an F550. He's now had the F550 for >1 year and a couple of months ago I caught him outside while walking and started a conversation about his truck/s. I asked him about the two trucks and why the change and what he thought about the two.
His comment on the '11 RAM was the Aisin tranny and turbo was replaced under warranty, and the second Aisin tranny went out a second time, with ball joints soon after and various problems with the DEF system, but didn't give specifics. The truck was decommissioned around ~150k miles.
His comment on the '13 Ford was the truck has 65k miles, power was similar to the RAM with maybe little less seat of the pants kick, but fuel mileage was 1-3 mpg better. So far he hasn't made any trips for repairs.
Finally he said the reason for the change was the cost to run these trucks and the fuel mileage improvements played a big part with all the miles they put on their trucks.
I'm no expert on this, so correct me if I am wrong, but it is my understanding that Ram diesel trucks did not add DEF fluid until 2014, which would leave your neighbor's story about DEF problems in a 2011 Ram suspect.