Originally Posted by onechaddude
My niece just rented a penske truck to move to Florida about 3 weeks ago. It was a ford f650 truck with 24' box on it. The truck had less than a 1000 miles on it and the guy she rented it from said it was just delivered as a brand new truck. I looked under it and it was a Cummins ISB 6.7 litre backed by a Allison 2500 6 speed tranny. I wondered why would Ford have a diesel engine and tranny of their own but go out and buy a Cummins and Allison and install them. Durability? Longevity? Makes you wonder.
No longer for next year.
Ford did use the 7.3L and 6.0L in their F650's and 750's. They also used Allison transmissions or manuals. Once the 6.4L was introduced it seemed the only choices were a CAT up until 2010??? I believe and then the Cummins. I don't have to work on them any more but using one brand engine, one brand transmission, and one brand cab and chassis is rather a nightmare sometimes trying to figure out what the actual fault is. Using one communication style should make diag and repairs much much easier. Plus in many cases you can go to most Ford dealers for service instead of where I work now go to one facility for engine repairs and another for Allison transmission repairs. Then you can get the blame game from either shop on why it's not their fault.